131221230432132 has 24 divisors (see below), whose sum is σ = 306185436489856. Its totient is φ = 43740043646688.

The previous prime is 131221230432109. The next prime is 131221230432137. The reversal of 131221230432132 is 231234032122131.

It is a super-2 number, since 2×131221230432132² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131221230432132.

It is not an unprimeable number, because it can be changed into a prime (131221230432137) 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, 44318383 + ... + 47186454.

Almost surely, 2^{131221230432132} is an apocalyptic number.

131221230432132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131221230432132 is an abundant number, since it is smaller than the sum of its proper divisors (174964206057724).

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

131221230432132 is a wasteful number, since it uses less digits than its factorization.

131221230432132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91624347 (or 91624345 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 131221230432132 its reverse (231234032122131), we get a palindrome (362455262554263).

The spelling of 131221230432132 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, four hundred thirty-two thousand, one hundred thirty-two".