312001022120 has 16 divisors (see below), whose sum is σ = 702002299860. Its totient is φ = 124800408832.

The previous prime is 312001022087. The next prime is 312001022143. The reversal of 312001022120 is 21220100213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 306984699844 + 5016322276 = 554062^2 + 70826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312001022095 and 312001022104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900012737 + ... + 3900012816.

Almost surely, 2^312001022120 is an apocalyptic number.

It is an amenable number.

312001022120 is an abundant number, since it is smaller than the sum of its proper divisors (390001277740).

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

312001022120 is a wasteful number, since it uses less digits than its factorization.

312001022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800025564 (or 7800025560 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 312001022120 its reverse (21220100213), we get a palindrome (333221122333).

The spelling of 312001022120 in words is "three hundred twelve billion, one million, twenty-two thousand, one hundred twenty".