3121021201245 has 32 divisors (see below), whose sum is σ = 5007446002944. Its totient is φ = 1659941376000.

The previous prime is 3121021201237. The next prime is 3121021201247. The reversal of 3121021201245 is 5421021201213.

It is a happy number.

It is not a de Polignac number, because 3121021201245 - 2³ = 3121021201237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121021201247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127111720 + ... + 127136270.

It is an arithmetic number, because the mean of its divisors is an integer number (156482687592).

Almost surely, 2^{3121021201245} is an apocalyptic number.

It is an amenable number.

3121021201245 is a deficient number, since it is larger than the sum of its proper divisors (1886424801699).

3121021201245 is a wasteful number, since it uses less digits than its factorization.

3121021201245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47653.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 3121021201245 its reverse (5421021201213), we get a palindrome (8542042402458).

The spelling of 3121021201245 in words is "three trillion, one hundred twenty-one billion, twenty-one million, two hundred one thousand, two hundred forty-five".