312221231120 has 40 divisors (see below), whose sum is σ = 726301453464. Its totient is φ = 124821896192.

The previous prime is 312221231111. The next prime is 312221231131. The reversal of 312221231120 is 21132122213.

It can be written as a sum of positive squares in 4 ways, for example, as 125624878096 + 186596353024 = 354436^2 + 431968^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 312221231092 and 312221231101.

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, 889469 + ... + 1189788.

Almost surely, 2^312221231120 is an apocalyptic number.

It is an amenable number.

312221231120 is an abundant number, since it is smaller than the sum of its proper divisors (414080222344).

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

312221231120 is a wasteful number, since it uses less digits than its factorization.

312221231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081147 (or 2081141 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 312221231120 its reverse (21132122213), we get a palindrome (333353353333).

The spelling of 312221231120 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty".