3121303201221 has 8 divisors (see below), whose sum is σ = 4161746309760. Its totient is φ = 2080864446752.

The previous prime is 3121303201187. The next prime is 3121303201229. The reversal of 3121303201221 is 1221023031213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121303201221 - 2¹¹ = 3121303199173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121303201229) 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, 1391140 + ... + 2859698.

It is an arithmetic number, because the mean of its divisors is an integer number (520218288720).

Almost surely, 2^{3121303201221} is an apocalyptic number.

It is an amenable number.

3121303201221 is a deficient number, since it is larger than the sum of its proper divisors (1040443108539).

3121303201221 is a wasteful number, since it uses less digits than its factorization.

3121303201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177035.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 3121303201221 its reverse (1221023031213), we get a palindrome (4342326232434).

The spelling of 3121303201221 in words is "three trillion, one hundred twenty-one billion, three hundred three million, two hundred one thousand, two hundred twenty-one".