113131213220 has 24 divisors (see below), whose sum is σ = 250079524800. Its totient is φ = 42870775392.

The previous prime is 113131213219. The next prime is 113131213253. The reversal of 113131213220 is 22312131311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 113131213192 and 113131213201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148856480 + ... + 148857239.

It is an arithmetic number, because the mean of its divisors is an integer number (10419980200).

Almost surely, 2^113131213220 is an apocalyptic number.

113131213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113131213220 is an abundant number, since it is smaller than the sum of its proper divisors (136948311580).

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

113131213220 is a wasteful number, since it uses less digits than its factorization.

113131213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297713747 (or 297713745 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 113131213220 its reverse (22312131311), we get a palindrome (135443344531).

The spelling of 113131213220 in words is "one hundred thirteen billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred twenty".