23121012 has 24 divisors (see below), whose sum is σ = 54121312. Its totient is φ = 7682400.

The previous prime is 23121011. The next prime is 23121031. The reversal of 23121012 is 21012132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062 + ... + 6882.

Almost surely, 2^23121012 is an apocalyptic number.

It is an amenable number.

23121012 is an abundant number, since it is smaller than the sum of its proper divisors (31000300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121012 is a wasteful number, since it uses less digits than its factorization.

23121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159 (or 6157 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 23121012 is about 4808.4313450438. The cubic root of 23121012 is about 284.8845823818.

Adding to 23121012 its reverse (21012132), we get a palindrome (44133144).

The spelling of 23121012 in words is "twenty-three million, one hundred twenty-one thousand, twelve".