3121042120 has 32 divisors (see below), whose sum is σ = 8025537600. Its totient is φ = 1070071488.

The previous prime is 3121042117. The next prime is 3121042123. The reversal of 3121042120 is 212401213.

It is an interprime number because it is at equal distance from previous prime (3121042117) and next prime (3121042123).

It is a junction number, because it is equal to n+sod(n) for n = 3121042094 and 3121042103.

It is not an unprimeable number, because it can be changed into a prime (3121042123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5573010 + ... + 5573569.

It is an arithmetic number, because the mean of its divisors is an integer number (250798050).

Almost surely, 2^3121042120 is an apocalyptic number.

It is an amenable number.

3121042120 is an abundant number, since it is smaller than the sum of its proper divisors (4904495480).

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

3121042120 is a wasteful number, since it uses less digits than its factorization.

3121042120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11146597 (or 11146593 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3121042120 is about 55866.2878666553. The cubic root of 3121042120 is about 1461.3913864106.

Adding to 3121042120 its reverse (212401213), we get a palindrome (3333443333).

The spelling of 3121042120 in words is "three billion, one hundred twenty-one million, forty-two thousand, one hundred twenty".