312111221010 has 32 divisors (see below), whose sum is σ = 749146769280. Its totient is φ = 83220787968.

The previous prime is 312111220997. The next prime is 312111221029. The reversal of 312111221010 is 10122111213.

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

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, 265815 + ... + 833594.

It is an arithmetic number, because the mean of its divisors is an integer number (23410836540).

Almost surely, 2^312111221010 is an apocalyptic number.

312111221010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312111221010 is an abundant number, since it is smaller than the sum of its proper divisors (437035548270).

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

312111221010 is a wasteful number, since it uses less digits than its factorization.

312111221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108882.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 312111221010 its reverse (10122111213), we get a palindrome (322233332223).

The spelling of 312111221010 in words is "three hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, ten".