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2100212401 = 7300030343
BaseRepresentation
bin111110100101110…
…1011001010110001
312102100220211210111
41331023223022301
513300123244101
6544222501321
7103021340140
oct17513531261
95370824714
102100212401
11988573731
124a7434841
13276163741
1415cd03757
15c45aa251
hex7d2eb2b1

2100212401 has 4 divisors (see below), whose sum is σ = 2400242752. Its totient is φ = 1800182052.

The previous prime is 2100212293. The next prime is 2100212417. The reversal of 2100212401 is 1042120012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2100212401 - 29 = 2100211889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100212441) 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, 150015165 + ... + 150015178.

It is an arithmetic number, because the mean of its divisors is an integer number (600060688).

Almost surely, 22100212401 is an apocalyptic number.

It is an amenable number.

2100212401 is a deficient number, since it is larger than the sum of its proper divisors (300030351).

2100212401 is an equidigital number, since it uses as much as digits as its factorization.

2100212401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300030350.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2100212401 is about 45828.0743758670. The cubic root of 2100212401 is about 1280.6223375471.

Adding to 2100212401 its reverse (1042120012), we get a palindrome (3142332413).

The spelling of 2100212401 in words is "two billion, one hundred million, two hundred twelve thousand, four hundred one".

Divisors: 1 7 300030343 2100212401