31221210113132 has 24 divisors (see below), whose sum is σ = 58948734461232. Its totient is φ = 14383153800000.

The previous prime is 31221210113111. The next prime is 31221210113147. The reversal of 31221210113132 is 23131101212213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31221210113098 and 31221210113107.

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 in 7 ways as a sum of consecutive naturals, for example, 554877494 + ... + 554933757.

It is an arithmetic number, because the mean of its divisors is an integer number (2456197269218).

Almost surely, 2^{31221210113132} is an apocalyptic number.

It is an amenable number.

31221210113132 is a deficient number, since it is larger than the sum of its proper divisors (27727524348100).

31221210113132 is a wasteful number, since it uses less digits than its factorization.

31221210113132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109811809 (or 1109811807 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31221210113132 its reverse (23131101212213), we get a palindrome (54352311325345).

The spelling of 31221210113132 in words is "thirty-one trillion, two hundred twenty-one billion, two hundred ten million, one hundred thirteen thousand, one hundred thirty-two".