212122102212021 has 16 divisors (see below), whose sum is σ = 285099870873600. Its totient is φ = 140279873223168.

The previous prime is 212122102211951. The next prime is 212122102212023. The reversal of 212122102212021 is 120212201221212.

It is not a de Polignac number, because 212122102212021 - 2¹⁷ = 212122102080949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122102212023) 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, 39874356 + ... + 44879933.

It is an arithmetic number, because the mean of its divisors is an integer number (17818741929600).

Almost surely, 2^{212122102212021} is an apocalyptic number.

It is an amenable number.

212122102212021 is a deficient number, since it is larger than the sum of its proper divisors (72977768661579).

212122102212021 is a wasteful number, since it uses less digits than its factorization.

212122102212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84760988.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212122102212021 its reverse (120212201221212), we get a palindrome (332334303433233).

The spelling of 212122102212021 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred two million, two hundred twelve thousand, twenty-one".