312022031220 has 72 divisors (see below), whose sum is σ = 947836911840. Its totient is φ = 83085428160.

The previous prime is 312022031219. The next prime is 312022031231. The reversal of 312022031220 is 22130220213.

312022031220 is a `hidden beast` number, since 312 + 0 + 2 + 20 + 312 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 312022031193 and 312022031202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1129930 + ... + 1378689.

Almost surely, 2^312022031220 is an apocalyptic number.

312022031220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312022031220 is an abundant number, since it is smaller than the sum of its proper divisors (635814880620).

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

312022031220 is a wasteful number, since it uses less digits than its factorization.

312022031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509325 (or 2509320 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 312022031220 its reverse (22130220213), we get a palindrome (334152251433).

The spelling of 312022031220 in words is "three hundred twelve billion, twenty-two million, thirty-one thousand, two hundred twenty".