131222021240 has 32 divisors (see below), whose sum is σ = 295347487680. Its totient is φ = 52471396992.

The previous prime is 131222021239. The next prime is 131222021261. The reversal of 131222021240 is 42120222131.

It is a super-2 number, since 2×131222021240² (a number of 23 digits) contains 22 as substring.

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

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, 421679 + ... + 663518.

It is an arithmetic number, because the mean of its divisors is an integer number (9229608990).

Almost surely, 2^131222021240 is an apocalyptic number.

131222021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131222021240 is an abundant number, since it is smaller than the sum of its proper divisors (164125466440).

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

131222021240 is a wasteful number, since it uses less digits than its factorization.

131222021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088231 (or 1088227 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 131222021240 its reverse (42120222131), we get a palindrome (173342243371).

The spelling of 131222021240 in words is "one hundred thirty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred forty".