212211131112121 has 16 divisors (see below), whose sum is σ = 214692170584320. Its totient is φ = 209738541150720.

The previous prime is 212211131112053. The next prime is 212211131112173. The reversal of 212211131112121 is 121211131112212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212211131112121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212211131112092 and 212211131112101.

It is not an unprimeable number, because it can be changed into a prime (212211131115121) 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, 120067665 + ... + 121822273.

It is an arithmetic number, because the mean of its divisors is an integer number (13418260661520).

Almost surely, 2^{212211131112121} is an apocalyptic number.

It is an amenable number.

212211131112121 is a deficient number, since it is larger than the sum of its proper divisors (2481039472199).

212211131112121 is a wasteful number, since it uses less digits than its factorization.

212211131112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757016.

The product of its digits is 96, while the sum is 22.

Adding to 212211131112121 its reverse (121211131112212), we get a palindrome (333422262224333).

Subtracting from 212211131112121 its reverse (121211131112212), we obtain a palindrome (90999999999909).

The spelling of 212211131112121 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred thirty-one million, one hundred twelve thousand, one hundred twenty-one".