212201112221201 has 16 divisors (see below), whose sum is σ = 226923937886160. Its totient is φ = 197727496396800.

The previous prime is 212201112221173. The next prime is 212201112221209. The reversal of 212201112221201 is 102122211102212.

It can be written as a sum of positive squares in 8 ways, for example, as 44738774577025 + 167462337644176 = 6688705^2 + 12940724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201112221201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212201112221209) 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, 20371055 + ... + 28972091.

It is an arithmetic number, because the mean of its divisors is an integer number (14182746117885).

Almost surely, 2^{212201112221201} is an apocalyptic number.

It is an amenable number.

212201112221201 is a deficient number, since it is larger than the sum of its proper divisors (14722825664959).

212201112221201 is a wasteful number, since it uses less digits than its factorization.

212201112221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615524.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212201112221201 its reverse (102122211102212), we get a palindrome (314323323323413).

The spelling of 212201112221201 in words is "two hundred twelve trillion, two hundred one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred one".