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2113123123 = 4435747639
BaseRepresentation
bin111110111110011…
…1011001100110011
312110021012202222101
41331330323030303
513311424414443
6545403321231
7103236151546
oct17574731463
95407182871
102113123123
11994891751
124ab820217
13278a34117
1416090485d
15c57aa84d
hex7df3b333

2113123123 has 4 divisors (see below), whose sum is σ = 2113215120. Its totient is φ = 2113031128.

The previous prime is 2113123121. The next prime is 2113123147. The reversal of 2113123123 is 3213213112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2113123123 - 21 = 2113123121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2113123123.

It is not an unprimeable number, because it can be changed into a prime (2113123121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20538 + ... + 68176.

It is an arithmetic number, because the mean of its divisors is an integer number (528303780).

Almost surely, 22113123123 is an apocalyptic number.

2113123123 is a deficient number, since it is larger than the sum of its proper divisors (91997).

2113123123 is an equidigital number, since it uses as much as digits as its factorization.

2113123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91996.

The product of its digits is 216, while the sum is 19.

The square root of 2113123123 is about 45968.7189619202. The cubic root of 2113123123 is about 1283.2411194475.

Adding to 2113123123 its reverse (3213213112), we get a palindrome (5326336235).

The spelling of 2113123123 in words is "two billion, one hundred thirteen million, one hundred twenty-three thousand, one hundred twenty-three".

Divisors: 1 44357 47639 2113123123