312221231130 has 32 divisors (see below), whose sum is σ = 750428121024. Its totient is φ = 83137087616.

The previous prime is 312221231111. The next prime is 312221231131. The reversal of 312221231130 is 31132122213.

It is a junction number, because it is equal to n+sod(n) for n = 312221231097 and 312221231106.

It is not an unprimeable number, because it can be changed into a prime (312221231131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7598379 + ... + 7639358.

It is an arithmetic number, because the mean of its divisors is an integer number (23450878782).

Almost surely, 2^312221231130 is an apocalyptic number.

312221231130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312221231130 is an abundant number, since it is smaller than the sum of its proper divisors (438206889894).

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

312221231130 is a wasteful number, since it uses less digits than its factorization.

312221231130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15238430.

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

Adding to 312221231130 its reverse (31132122213), we get a palindrome (343353353343).

The spelling of 312221231130 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, one hundred thirty".