3121203004021 has 16 divisors (see below), whose sum is σ = 3234158222848. Its totient is φ = 3010651934400.

The previous prime is 3121203004009. The next prime is 3121203004033. The reversal of 3121203004021 is 1204003021213.

It is a happy number.

3121203004021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3121203004009) and next prime (3121203004033).

It is a cyclic number.

It is not a de Polignac number, because 3121203004021 - 2²¹ = 3121200906869 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 3121203004021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121203004081) 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, 800910 + ... + 2623711.

It is an arithmetic number, because the mean of its divisors is an integer number (202134888928).

Almost surely, 2^{3121203004021} is an apocalyptic number.

It is an amenable number.

3121203004021 is a deficient number, since it is larger than the sum of its proper divisors (112955218827).

3121203004021 is a wasteful number, since it uses less digits than its factorization.

3121203004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424972.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 3121203004021 its reverse (1204003021213), we get a palindrome (4325206025234).

The spelling of 3121203004021 in words is "three trillion, one hundred twenty-one billion, two hundred three million, four thousand, twenty-one".