31220221332132 has 144 divisors (see below), whose sum is σ = 94358863872000. Its totient is φ = 8509956421824.

The previous prime is 31220221332127. The next prime is 31220221332191. The reversal of 31220221332132 is 23123312202213.

31220221332132 is a `hidden beast` number, since 3 + 1 + 220 + 221 + 3 + 3 + 213 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31220221332096 and 31220221332105.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4812132 + ... + 9251867.

It is an arithmetic number, because the mean of its divisors is an integer number (655269888000).

Almost surely, 2^{31220221332132} is an apocalyptic number.

It is an amenable number.

31220221332132 is an abundant number, since it is smaller than the sum of its proper divisors (63138642539868).

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

31220221332132 is a wasteful number, since it uses less digits than its factorization.

31220221332132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064422 (or 14064417 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31220221332132 its reverse (23123312202213), we get a palindrome (54343533534345).

The spelling of 31220221332132 in words is "thirty-one trillion, two hundred twenty billion, two hundred twenty-one million, three hundred thirty-two thousand, one hundred thirty-two".