3120121033021 has 16 divisors (see below), whose sum is σ = 3230594582400. Its totient is φ = 3009840724800.

The previous prime is 3120121032983. The next prime is 3120121033031. The reversal of 3120121033021 is 1203301210213.

It is not a de Polignac number, because 3120121033021 - 2⁷ = 3120121032893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3120121033021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120121033031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334808200 + ... + 334817518.

It is an arithmetic number, because the mean of its divisors is an integer number (201912161400).

Almost surely, 2^{3120121033021} is an apocalyptic number.

It is an amenable number.

3120121033021 is a deficient number, since it is larger than the sum of its proper divisors (110473549379).

3120121033021 is a wasteful number, since it uses less digits than its factorization.

3120121033021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18420.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 3120121033021 its reverse (1203301210213), we get a palindrome (4323422243234).

The spelling of 3120121033021 in words is "three trillion, one hundred twenty billion, one hundred twenty-one million, thirty-three thousand, twenty-one".