2122102222021 has 4 divisors (see below), whose sum is σ = 2173860812844. Its totient is φ = 2070343631200.

The previous prime is 2122102222013. The next prime is 2122102222057. The reversal of 2122102222021 is 1202222012212.

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 78663420900 + 2043438801121 = 280470^2 + 1429489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122102222021 - 2³ = 2122102222013 is a prime.

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 2122102222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122102229021) 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, 25879295350 + ... + 25879295431.

It is an arithmetic number, because the mean of its divisors is an integer number (543465203211).

Almost surely, 2^{2122102222021} is an apocalyptic number.

It is an amenable number.

2122102222021 is a deficient number, since it is larger than the sum of its proper divisors (51758590823).

2122102222021 is an equidigital number, since it uses as much as digits as its factorization.

2122102222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51758590822.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2122102222021 its reverse (1202222012212), we get a palindrome (3324324234233).

The spelling of 2122102222021 in words is "two trillion, one hundred twenty-two billion, one hundred two million, two hundred twenty-two thousand, twenty-one".