31132032213221 has 8 divisors (see below), whose sum is σ = 31973876465664. Its totient is φ = 30290211012240.

The previous prime is 31132032213187. The next prime is 31132032213223. The reversal of 31132032213221 is 12231223023113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31132032213221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132032213223) 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, 3007685 + ... + 8444538.

It is an arithmetic number, because the mean of its divisors is an integer number (3996734558208).

Almost surely, 2^{31132032213221} is an apocalyptic number.

It is an amenable number.

31132032213221 is a deficient number, since it is larger than the sum of its proper divisors (841844252443).

31132032213221 is a wasteful number, since it uses less digits than its factorization.

31132032213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525731.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31132032213221 its reverse (12231223023113), we get a palindrome (43363255236334).

The spelling of 31132032213221 in words is "thirty-one trillion, one hundred thirty-two billion, thirty-two million, two hundred thirteen thousand, two hundred twenty-one".