201221013012131 has 16 divisors (see below), whose sum is σ = 230091515136000. Its totient is φ = 172381680413088.

The previous prime is 201221013012109. The next prime is 201221013012191. The reversal of 201221013012131 is 131210310122102.

It is a cyclic number.

It is not a de Polignac number, because 201221013012131 - 2³⁸ = 200946135105187 is a prime.

It is a super-2 number, since 2×201221013012131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201221013012191) 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, 284378726 + ... + 285085428.

It is an arithmetic number, because the mean of its divisors is an integer number (14380719696000).

Almost surely, 2^{201221013012131} is an apocalyptic number.

201221013012131 is a deficient number, since it is larger than the sum of its proper divisors (28870502123869).

201221013012131 is a wasteful number, since it uses less digits than its factorization.

201221013012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728698.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 201221013012131 its reverse (131210310122102), we get a palindrome (332431323134233).

The spelling of 201221013012131 in words is "two hundred one trillion, two hundred twenty-one billion, thirteen million, twelve thousand, one hundred thirty-one".