3121000000120 has 48 divisors (see below), whose sum is σ = 7107875391960. Its totient is φ = 1233358927296.

The previous prime is 3121000000109. The next prime is 3121000000147. The reversal of 3121000000120 is 210000001213.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 3121000000097 and 3121000000106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5387454 + ... + 5938573.

Almost surely, 2^{3121000000120} is an apocalyptic number.

It is an amenable number.

3121000000120 is an abundant number, since it is smaller than the sum of its proper divisors (3986875391840).

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

3121000000120 is a wasteful number, since it uses less digits than its factorization.

3121000000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11326204 (or 11326117 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 3121000000120 its reverse (210000001213), we get a palindrome (3331000001333).

The spelling of 3121000000120 in words is "three trillion, one hundred twenty-one billion, one hundred twenty", and thus it is an aban number.