212102122200121 has 4 divisors (see below), whose sum is σ = 212102185158544. Its totient is φ = 212102059241700.

The previous prime is 212102122200107. The next prime is 212102122200151. The reversal of 212102122200121 is 121002221201212.

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 212102122200121 - 2²⁷ = 212101987982393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102122200151) 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, 26121915 + ... + 33264976.

It is an arithmetic number, because the mean of its divisors is an integer number (53025546289636).

Almost surely, 2^{212102122200121} is an apocalyptic number.

It is an amenable number.

212102122200121 is a deficient number, since it is larger than the sum of its proper divisors (62958423).

212102122200121 is an equidigital number, since it uses as much as digits as its factorization.

212102122200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62958422.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212102122200121 its reverse (121002221201212), we get a palindrome (333104343401333).

The spelling of 212102122200121 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-two million, two hundred thousand, one hundred twenty-one".