312111332220 has 48 divisors (see below), whose sum is σ = 888723803520. Its totient is φ = 81819014976.

The previous prime is 312111332219. The next prime is 312111332249. The reversal of 312111332220 is 22233111213.

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, 44079982 + ... + 44087061.

It is an arithmetic number, because the mean of its divisors is an integer number (18515079240).

Almost surely, 2^312111332220 is an apocalyptic number.

312111332220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312111332220 is an abundant number, since it is smaller than the sum of its proper divisors (576612471300).

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

312111332220 is a wasteful number, since it uses less digits than its factorization.

312111332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88167114 (or 88167112 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312111332220 its reverse (22233111213), we get a palindrome (334344443433).

The spelling of 312111332220 in words is "three hundred twelve billion, one hundred eleven million, three hundred thirty-two thousand, two hundred twenty".