131211980 has 12 divisors (see below), whose sum is σ = 275545200. Its totient is φ = 52484784.

The previous prime is 131211973. The next prime is 131211989. The reversal of 131211980 is 89112131.

It is not an unprimeable number, because it can be changed into a prime (131211989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280280 + ... + 3280319.

It is an arithmetic number, because the mean of its divisors is an integer number (22962100).

Almost surely, 2^131211980 is an apocalyptic number.

131211980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131211980 is an abundant number, since it is smaller than the sum of its proper divisors (144333220).

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

131211980 is a wasteful number, since it uses less digits than its factorization.

131211980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560608 (or 6560606 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 131211980 is about 11454.7797883678. The cubic root of 131211980 is about 508.1491026977.

The spelling of 131211980 in words is "one hundred thirty-one million, two hundred eleven thousand, nine hundred eighty".