312003242120 has 16 divisors (see below), whose sum is σ = 702007294860. Its totient is φ = 124801296832.

The previous prime is 312003242107. The next prime is 312003242137. The reversal of 312003242120 is 21242300213.

It can be written as a sum of positive squares in 2 ways, for example, as 300034444516 + 11968797604 = 547754^2 + 109402^2 .

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 = 312003242092 and 312003242101.

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, 3900040487 + ... + 3900040566.

Almost surely, 2^312003242120 is an apocalyptic number.

It is an amenable number.

312003242120 is an abundant number, since it is smaller than the sum of its proper divisors (390004052740).

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

312003242120 is a wasteful number, since it uses less digits than its factorization.

312003242120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800081064 (or 7800081060 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 312003242120 its reverse (21242300213), we get a palindrome (333245542333).

The spelling of 312003242120 in words is "three hundred twelve billion, three million, two hundred forty-two thousand, one hundred twenty".