20113131112 has 128 divisors (see below), whose sum is σ = 41248310400. Its totient is φ = 9165312000.

The previous prime is 20113131107. The next prime is 20113131133. The reversal of 20113131112 is 21113131102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146811108 + ... + 146811244.

It is an arithmetic number, because the mean of its divisors is an integer number (322252425).

Almost surely, 2^20113131112 is an apocalyptic number.

It is an amenable number.

20113131112 is an abundant number, since it is smaller than the sum of its proper divisors (21135179288).

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

20113131112 is a wasteful number, since it uses less digits than its factorization.

20113131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20113131112 its reverse (21113131102), we get a palindrome (41226262214).

The spelling of 20113131112 in words is "twenty billion, one hundred thirteen million, one hundred thirty-one thousand, one hundred twelve".