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2111025121 = 3760194933
BaseRepresentation
bin111110111010011…
…1010111111100001
312110010021012001121
41331310322333201
513310410300441
6545250332241
7103212263122
oct17564727741
95403235047
102111025121
11993689467
124aab8a081
1327847b1ba
1416051a049
15c54e3dd1
hex7dd3afe1

2111025121 has 8 divisors (see below), whose sum is σ = 2171710184. Its totient is φ = 2050531200.

The previous prime is 2111025089. The next prime is 2111025157. The reversal of 2111025121 is 1215201112.

It can be written as a sum of positive squares in 4 ways, for example, as 1358291025 + 752734096 = 36855^2 + 27436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111025121 - 25 = 2111025089 is a prime.

It is a super-2 number, since 2×21110251212 = 8912854122986129282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111025095 and 2111025104.

It is not an unprimeable number, because it can be changed into a prime (2111025181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25230 + ... + 69703.

It is an arithmetic number, because the mean of its divisors is an integer number (271463773).

Almost surely, 22111025121 is an apocalyptic number.

It is an amenable number.

2111025121 is a deficient number, since it is larger than the sum of its proper divisors (60685063).

2111025121 is an equidigital number, since it uses as much as digits as its factorization.

2111025121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95571.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 2111025121 is about 45945.8934073547. The cubic root of 2111025121 is about 1282.8162926607.

Adding to 2111025121 its reverse (1215201112), we get a palindrome (3326226233).

The spelling of 2111025121 in words is "two billion, one hundred eleven million, twenty-five thousand, one hundred twenty-one".

Divisors: 1 37 601 22237 94933 3512521 57054733 2111025121