212211121023121 has 4 divisors (see below), whose sum is σ = 231503041116144. Its totient is φ = 192919200930100.

The previous prime is 212211121023089. The next prime is 212211121023133. The reversal of 212211121023121 is 121320121112212.

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 212211121023121 - 2⁵ = 212211121023089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212211121023092 and 212211121023101.

It is not an unprimeable number, because it can be changed into a prime (212211121020121) 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, 9645960046495 + ... + 9645960046516.

It is an arithmetic number, because the mean of its divisors is an integer number (57875760279036).

Almost surely, 2^{212211121023121} is an apocalyptic number.

It is an amenable number.

212211121023121 is a deficient number, since it is larger than the sum of its proper divisors (19291920093023).

212211121023121 is a wasteful number, since it uses less digits than its factorization.

212211121023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19291920093022.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 212211121023121 its reverse (121320121112212), we get a palindrome (333531242135333).

The spelling of 212211121023121 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty-one million, twenty-three thousand, one hundred twenty-one".