113231131220212 has 24 divisors (see below), whose sum is σ = 199486595637000. Its totient is φ = 56234969496576.

The previous prime is 113231131220209. The next prime is 113231131220213. The reversal of 113231131220212 is 212022131132311.

It can be written as a sum of positive squares in 4 ways, for example, as 1873848880996 + 111357282339216 = 1368886^2 + 10552596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113231131220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55033464 + ... + 57053872.

It is an arithmetic number, because the mean of its divisors is an integer number (8311941484875).

Almost surely, 2^{113231131220212} is an apocalyptic number.

It is an amenable number.

113231131220212 is a deficient number, since it is larger than the sum of its proper divisors (86255464416788).

113231131220212 is a wasteful number, since it uses less digits than its factorization.

113231131220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114595 (or 2114593 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 113231131220212 its reverse (212022131132311), we get a palindrome (325253262352523).

The spelling of 113231131220212 in words is "one hundred thirteen trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred twenty thousand, two hundred twelve".