212202111010121 has 4 divisors (see below), whose sum is σ = 212731293332244. Its totient is φ = 211672928688000.

The previous prime is 212202111010117. The next prime is 212202111010139. The reversal of 212202111010121 is 121010111202212.

212202111010121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185897408736400 + 26304702273721 = 13634420^2 + 5128811^2 .

It is a cyclic number.

It is not a de Polignac number, because 212202111010121 - 2² = 212202111010117 is a prime.

It is a super-2 number, since 2×212202111010121² (a number of 29 digits) contains 22 as substring.

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 212202111010121.

It is not an unprimeable number, because it can be changed into a prime (212202111010111) 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, 264591160460 + ... + 264591161261.

It is an arithmetic number, because the mean of its divisors is an integer number (53182823333061).

Almost surely, 2^{212202111010121} is an apocalyptic number.

It is an amenable number.

212202111010121 is a deficient number, since it is larger than the sum of its proper divisors (529182322123).

212202111010121 is an equidigital number, since it uses as much as digits as its factorization.

212202111010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529182322122.

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

Adding to 212202111010121 its reverse (121010111202212), we get a palindrome (333212222212333).

The spelling of 212202111010121 in words is "two hundred twelve trillion, two hundred two billion, one hundred eleven million, ten thousand, one hundred twenty-one".