212211211121 has 16 divisors (see below), whose sum is σ = 261226522368. Its totient is φ = 167875416000.

The previous prime is 212211211117. The next prime is 212211211127. The reversal of 212211211121 is 121112112212.

It is a cyclic number.

It is not a de Polignac number, because 212211211121 - 2² = 212211211117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212211211121.

It is not an unprimeable number, because it can be changed into a prime (212211211127) 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, 364076 + ... + 746306.

It is an arithmetic number, because the mean of its divisors is an integer number (16326657648).

Almost surely, 2^212211211121 is an apocalyptic number.

It is an amenable number.

212211211121 is a deficient number, since it is larger than the sum of its proper divisors (49015311247).

212211211121 is a wasteful number, since it uses less digits than its factorization.

212211211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388352.

The product of its digits is 32, while the sum is 17.

Adding to 212211211121 its reverse (121112112212), we get a palindrome (333323323333).

The spelling of 212211211121 in words is "two hundred twelve billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-one".