31331021132 has 6 divisors (see below), whose sum is σ = 54829286988. Its totient is φ = 15665510564.

The previous prime is 31331021123. The next prime is 31331021159. The reversal of 31331021132 is 23112013313.

It is a super-2 number, since 2×31331021132² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3916377638 + ... + 3916377645.

It is an arithmetic number, because the mean of its divisors is an integer number (9138214498).

Almost surely, 2^31331021132 is an apocalyptic number.

It is an amenable number.

31331021132 is a deficient number, since it is larger than the sum of its proper divisors (23498265856).

31331021132 is a wasteful number, since it uses less digits than its factorization.

31331021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832755287 (or 7832755285 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31331021132 its reverse (23112013313), we get a palindrome (54443034445).

The spelling of 31331021132 in words is "thirty-one billion, three hundred thirty-one million, twenty-one thousand, one hundred thirty-two".