23121220232 has 64 divisors (see below), whose sum is σ = 50841907200. Its totient is φ = 9744632640.

The previous prime is 23121220231. The next prime is 23121220249. The reversal of 23121220232 is 23202212132.

It is a happy number.

It is a super-2 number, since 2×23121220232² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23121220231) 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 15 ways as a sum of consecutive naturals, for example, 68528 + ... + 225695.

It is an arithmetic number, because the mean of its divisors is an integer number (794404800).

Almost surely, 2^23121220232 is an apocalyptic number.

23121220232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

23121220232 is an abundant number, since it is smaller than the sum of its proper divisors (27720686968).

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

23121220232 is a wasteful number, since it uses less digits than its factorization.

23121220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294306 (or 294302 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23121220232 its reverse (23202212132), we get a palindrome (46323432364).

The spelling of 23121220232 in words is "twenty-three billion, one hundred twenty-one million, two hundred twenty thousand, two hundred thirty-two".