31221314124 has 144 divisors (see below), whose sum is σ = 99559143936. Its totient is φ = 7485609600.

The previous prime is 31221314099. The next prime is 31221314153. The reversal of 31221314124 is 42141312213.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31221314094 and 31221314103.

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 47 ways as a sum of consecutive naturals, for example, 101572 + ... + 269739.

It is an arithmetic number, because the mean of its divisors is an integer number (691382944).

Almost surely, 2^31221314124 is an apocalyptic number.

It is an amenable number.

31221314124 is an abundant number, since it is smaller than the sum of its proper divisors (68337829812).

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

31221314124 is a wasteful number, since it uses less digits than its factorization.

31221314124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371356 (or 371347 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 31221314124 its reverse (42141312213), we get a palindrome (73362626337).

The spelling of 31221314124 in words is "thirty-one billion, two hundred twenty-one million, three hundred fourteen thousand, one hundred twenty-four".