23121120312 has 24 divisors (see below), whose sum is σ = 62619701040. Its totient is φ = 7707040080.

The previous prime is 23121120307. The next prime is 23121120329. The reversal of 23121120312 is 21302112132.

23121120312 is a `hidden beast` number, since 231 + 2 + 1 + 120 + 312 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160563264 + ... + 160563407.

It is an arithmetic number, because the mean of its divisors is an integer number (2609154210).

Almost surely, 2^23121120312 is an apocalyptic number.

It is an amenable number.

23121120312 is an abundant number, since it is smaller than the sum of its proper divisors (39498580728).

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

23121120312 is a wasteful number, since it uses less digits than its factorization.

23121120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321126683 (or 321126676 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23121120312 its reverse (21302112132), we get a palindrome (44423232444).

The spelling of 23121120312 in words is "twenty-three billion, one hundred twenty-one million, one hundred twenty thousand, three hundred twelve".