23121010 has 16 divisors (see below), whose sum is σ = 45401472. Its totient is φ = 8407600.

The previous prime is 23120989. The next prime is 23121011. The reversal of 23121010 is 1012132.

It is a super-2 number, since 2×23121010² = 1069162206840200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 104986 + ... + 105205.

It is an arithmetic number, because the mean of its divisors is an integer number (2837592).

Almost surely, 2^23121010 is an apocalyptic number.

23121010 is a deficient number, since it is larger than the sum of its proper divisors (22280462).

23121010 is a wasteful number, since it uses less digits than its factorization.

23121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210209.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 23121010 is about 4808.4311370758. The cubic root of 23121010 is about 284.8845741675.

Adding to 23121010 its reverse (1012132), we get a palindrome (24133142).

The spelling of 23121010 in words is "twenty-three million, one hundred twenty-one thousand, ten".