23220312012 has 24 divisors (see below), whose sum is σ = 60200809200. Its totient is φ = 7740103968.

The previous prime is 23220312001. The next prime is 23220312023. The reversal of 23220312012 is 21021302232.

It is an interprime number because it is at equal distance from previous prime (23220312001) and next prime (23220312023).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107501337 + ... + 107501552.

It is an arithmetic number, because the mean of its divisors is an integer number (2508367050).

Almost surely, 2^23220312012 is an apocalyptic number.

It is an amenable number.

23220312012 is an abundant number, since it is smaller than the sum of its proper divisors (36980497188).

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

23220312012 is a wasteful number, since it uses less digits than its factorization.

23220312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215002902 (or 215002894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23220312012 its reverse (21021302232), we get a palindrome (44241614244).

The spelling of 23220312012 in words is "twenty-three billion, two hundred twenty million, three hundred twelve thousand, twelve".