212201122132221 has 16 divisors (see below), whose sum is σ = 290600621213184. Its totient is φ = 137635016387904.

The previous prime is 212201122132189. The next prime is 212201122132229. The reversal of 212201122132221 is 122231221102212.

It is not a de Polignac number, because 212201122132221 - 2⁵ = 212201122132189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212201122132191 and 212201122132200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201122132229) 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, 60471501 + ... + 63884306.

It is an arithmetic number, because the mean of its divisors is an integer number (18162538825824).

Almost surely, 2^{212201122132221} is an apocalyptic number.

It is an amenable number.

212201122132221 is a deficient number, since it is larger than the sum of its proper divisors (78399499080963).

212201122132221 is a wasteful number, since it uses less digits than its factorization.

212201122132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124371220.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 212201122132221 its reverse (122231221102212), we get a palindrome (334432343234433).

The spelling of 212201122132221 in words is "two hundred twelve trillion, two hundred one billion, one hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty-one".