212122223331121 has 4 divisors (see below), whose sum is σ = 212160574850544. Its totient is φ = 212083871811700.

The previous prime is 212122223331047. The next prime is 212122223331133. The reversal of 212122223331121 is 121133322221212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212122223331121 - 2⁴⁷ = 71384734975793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212122223331121.

It is not an unprimeable number, because it can be changed into a prime (212122223331721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19175751415 + ... + 19175762476.

It is an arithmetic number, because the mean of its divisors is an integer number (53040143712636).

Almost surely, 2^{212122223331121} is an apocalyptic number.

It is an amenable number.

212122223331121 is a deficient number, since it is larger than the sum of its proper divisors (38351519423).

212122223331121 is an equidigital number, since it uses as much as digits as its factorization.

212122223331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38351519422.

The product of its digits is 3456, while the sum is 28.

Adding to 212122223331121 its reverse (121133322221212), we get a palindrome (333255545552333).

The spelling of 212122223331121 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred twenty-three million, three hundred thirty-one thousand, one hundred twenty-one".