23131122112 has 56 divisors (see below), whose sum is σ = 52647742304. Its totient is φ = 9877496832.

The previous prime is 23131122109. The next prime is 23131122121. The reversal of 23131122112 is 21122113132.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 23131122112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30898 + ... + 217294.

Almost surely, 2^23131122112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26323871152).

23131122112 is an abundant number, since it is smaller than the sum of its proper divisors (29516620192).

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

23131122112 is a wasteful number, since it uses less digits than its factorization.

23131122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186693 (or 186683 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 23131122112 its reverse (21122113132), we get a palindrome (44253235244).

The spelling of 23131122112 in words is "twenty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, one hundred twelve".