212110210222121 has 4 divisors (see below), whose sum is σ = 212255590765200. Its totient is φ = 211964829679044.

The previous prime is 212110210222111. The next prime is 212110210222181. The reversal of 212110210222121 is 121222012011212.

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 212110210222121 - 2¹⁴ = 212110210205737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212110210222093 and 212110210222102.

It is not an unprimeable number, because it can be changed into a prime (212110210222111) 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, 72690269351 + ... + 72690272268.

It is an arithmetic number, because the mean of its divisors is an integer number (53063897691300).

Almost surely, 2^{212110210222121} is an apocalyptic number.

It is an amenable number.

212110210222121 is a deficient number, since it is larger than the sum of its proper divisors (145380543079).

212110210222121 is a wasteful number, since it uses less digits than its factorization.

212110210222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145380543078.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212110210222121 its reverse (121222012011212), we get a palindrome (333332222233333).

The spelling of 212110210222121 in words is "two hundred twelve trillion, one hundred ten billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".