213131222012201 has 16 divisors (see below), whose sum is σ = 222148695994368. Its totient is φ = 204247753491600.

The previous prime is 213131222012179. The next prime is 213131222012207. The reversal of 213131222012201 is 102210222131312.

It is a cyclic number.

It is not a de Polignac number, because 213131222012201 - 2²² = 213131217817897 is a prime.

It is a super-2 number, since 2×213131222012201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213131222012207) 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, 114056330 + ... + 115909916.

It is an arithmetic number, because the mean of its divisors is an integer number (13884293499648).

Almost surely, 2^{213131222012201} is an apocalyptic number.

It is an amenable number.

213131222012201 is a deficient number, since it is larger than the sum of its proper divisors (9017473982167).

213131222012201 is a wasteful number, since it uses less digits than its factorization.

213131222012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889732.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 213131222012201 its reverse (102210222131312), we get a palindrome (315341444143513).

The spelling of 213131222012201 in words is "two hundred thirteen trillion, one hundred thirty-one billion, two hundred twenty-two million, twelve thousand, two hundred one".