31220320244132 has 12 divisors (see below), whose sum is σ = 54635609565936. Its totient is φ = 15610146082440.

The previous prime is 31220320244089. The next prime is 31220320244143. The reversal of 31220320244132 is 23144202302213.

It is a super-2 number, since 2×31220320244132² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31220320244095 and 31220320244104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2723507 + ... + 8358117.

It is an arithmetic number, because the mean of its divisors is an integer number (4552967463828).

Almost surely, 2^{31220320244132} is an apocalyptic number.

It is an amenable number.

31220320244132 is a deficient number, since it is larger than the sum of its proper divisors (23415289321804).

31220320244132 is a wasteful number, since it uses less digits than its factorization.

31220320244132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019818 (or 7019816 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31220320244132 its reverse (23144202302213), we get a palindrome (54364522546345).

The spelling of 31220320244132 in words is "thirty-one trillion, two hundred twenty billion, three hundred twenty million, two hundred forty-four thousand, one hundred thirty-two".