312111220020 has 24 divisors (see below), whose sum is σ = 873911416224. Its totient is φ = 83229658656.

The previous prime is 312111219991. The next prime is 312111220093. The reversal of 312111220020 is 20022111213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2600926774 + ... + 2600926893.

It is an arithmetic number, because the mean of its divisors is an integer number (36412975676).

Almost surely, 2^312111220020 is an apocalyptic number.

312111220020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312111220020 is an abundant number, since it is smaller than the sum of its proper divisors (561800196204).

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

312111220020 is a wasteful number, since it uses less digits than its factorization.

312111220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201853679 (or 5201853677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 312111220020 its reverse (20022111213), we get a palindrome (332133331233).

The spelling of 312111220020 in words is "three hundred twelve billion, one hundred eleven million, two hundred twenty thousand, twenty".