3121203113201 has 4 divisors (see below), whose sum is σ = 3123241784304. Its totient is φ = 3119164442100.

The previous prime is 3121203113137. The next prime is 3121203113213. The reversal of 3121203113201 is 1023113021213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3121203113201 - 2⁶ = 3121203113137 is a prime.

It is a super-2 number, since 2×3121203113201² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121203113801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019333255 + ... + 1019336316.

It is an arithmetic number, because the mean of its divisors is an integer number (780810446076).

Almost surely, 2^{3121203113201} is an apocalyptic number.

It is an amenable number.

3121203113201 is a deficient number, since it is larger than the sum of its proper divisors (2038671103).

3121203113201 is a wasteful number, since it uses less digits than its factorization.

3121203113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038671102.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 3121203113201 its reverse (1023113021213), we get a palindrome (4144316134414).

The spelling of 3121203113201 in words is "three trillion, one hundred twenty-one billion, two hundred three million, one hundred thirteen thousand, two hundred one".