312021121228 has 24 divisors (see below), whose sum is σ = 556773051744. Its totient is φ = 152959555200.

The previous prime is 312021121189. The next prime is 312021121231. The reversal of 312021121228 is 822121120213.

It is a happy number.

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, 1980025 + ... + 2131792.

It is an arithmetic number, because the mean of its divisors is an integer number (23198877156).

Almost surely, 2^312021121228 is an apocalyptic number.

It is an amenable number.

312021121228 is a deficient number, since it is larger than the sum of its proper divisors (244751930516).

312021121228 is a wasteful number, since it uses less digits than its factorization.

312021121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112193 (or 4112191 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 312021121228 in words is "three hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-eight".