312221121312120 has 32 divisors (see below), whose sum is σ = 936663363936720. Its totient is φ = 83258965683200.

The previous prime is 312221121312119. The next prime is 312221121312137. The reversal of 312221121312120 is 21213121122213.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300921338681 + ... + 1300921338920.

Almost surely, 2^{312221121312120} is an apocalyptic number.

312221121312120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312221121312120 is an abundant number, since it is smaller than the sum of its proper divisors (624442242624600).

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

312221121312120 is a wasteful number, since it uses less digits than its factorization.

312221121312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601842677615 (or 2601842677611 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 312221121312120 its reverse (21213121122213), we get a palindrome (333434242434333).

The spelling of 312221121312120 in words is "three hundred twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twelve thousand, one hundred twenty".