131221303423232 has 72 divisors (see below), whose sum is σ = 286672601040672. Its totient is φ = 59451759820800.

The previous prime is 131221303423187. The next prime is 131221303423339. The reversal of 131221303423232 is 232324303122131.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 75028769 + ... + 76757792.

Almost surely, 2^{131221303423232} is an apocalyptic number.

It is an amenable number.

131221303423232 is an abundant number, since it is smaller than the sum of its proper divisors (155451297617440).

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

131221303423232 is a wasteful number, since it uses less digits than its factorization.

131221303423232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151786895 (or 151786881 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 131221303423232 its reverse (232324303122131), we get a palindrome (363545606545363).

The spelling of 131221303423232 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred three million, four hundred twenty-three thousand, two hundred thirty-two".