31221010120030 has 32 divisors (see below), whose sum is σ = 58665935328768. Its totient is φ = 11940391610400.

The previous prime is 31221010120019. The next prime is 31221010120049. The reversal of 31221010120030 is 3002101012213.

It is a junction number, because it is equal to n+sod(n) for n = 31221010119986 and 31221010120013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28080466 + ... + 29171125.

It is an arithmetic number, because the mean of its divisors is an integer number (1833310479024).

Almost surely, 2^{31221010120030} is an apocalyptic number.

31221010120030 is a deficient number, since it is larger than the sum of its proper divisors (27444925208738).

31221010120030 is a wasteful number, since it uses less digits than its factorization.

31221010120030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57253992.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31221010120030 its reverse (3002101012213), we get a palindrome (34223111132243).

The spelling of 31221010120030 in words is "thirty-one trillion, two hundred twenty-one billion, ten million, one hundred twenty thousand, thirty".