23121102321 has 8 divisors (see below), whose sum is σ = 34253484960. Its totient is φ = 15414068196.

The previous prime is 23121102311. The next prime is 23121102349. The reversal of 23121102321 is 12320112132.

23121102321 is a `hidden beast` number, since 231 + 2 + 110 + 2 + 321 = 666.

It is not a de Polignac number, because 23121102321 - 2²⁷ = 22986884593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23121102294 and 23121102303.

It is not an unprimeable number, because it can be changed into a prime (23121102311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428168535 + ... + 428168588.

It is an arithmetic number, because the mean of its divisors is an integer number (4281685620).

Almost surely, 2^23121102321 is an apocalyptic number.

It is an amenable number.

23121102321 is a deficient number, since it is larger than the sum of its proper divisors (11132382639).

23121102321 is an equidigital number, since it uses as much as digits as its factorization.

23121102321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856337132 (or 856337126 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23121102321 its reverse (12320112132), we get a palindrome (35441214453).

The spelling of 23121102321 in words is "twenty-three billion, one hundred twenty-one million, one hundred two thousand, three hundred twenty-one".