131220412 has 24 divisors (see below), whose sum is σ = 232792560. Its totient is φ = 64713600.

The previous prime is 131220409. The next prime is 131220449. The reversal of 131220412 is 214022131.

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, 152688 + ... + 153544.

It is an arithmetic number, because the mean of its divisors is an integer number (9699690).

Almost surely, 2^131220412 is an apocalyptic number.

It is an amenable number.

131220412 is a deficient number, since it is larger than the sum of its proper divisors (101572148).

131220412 is a wasteful number, since it uses less digits than its factorization.

131220412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 131220412 is about 11455.1478384175. The cubic root of 131220412 is about 508.1599874290.

Adding to 131220412 its reverse (214022131), we get a palindrome (345242543).

The spelling of 131220412 in words is "one hundred thirty-one million, two hundred twenty thousand, four hundred twelve".