23121000331 has 32 divisors (see below), whose sum is σ = 28787064768. Its totient is φ = 18244362240.

The previous prime is 23121000323. The next prime is 23121000341. The reversal of 23121000331 is 13300012132.

It is not a de Polignac number, because 23121000331 - 2³ = 23121000323 is a prime.

It is a super-2 number, since 2×23121000331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23121000341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3149341 + ... + 3156673.

It is an arithmetic number, because the mean of its divisors is an integer number (899595774).

Almost surely, 2^23121000331 is an apocalyptic number.

23121000331 is a deficient number, since it is larger than the sum of its proper divisors (5666064437).

23121000331 is a wasteful number, since it uses less digits than its factorization.

23121000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 23121000331 its reverse (13300012132), we get a palindrome (36421012463).

The spelling of 23121000331 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirty-one", and thus it is an aban number.