2222102020021 has 4 divisors (see below), whose sum is σ = 2393032944652. Its totient is φ = 2051171095392.

The previous prime is 2222102019983. The next prime is 2222102020069. The reversal of 2222102020021 is 1200202012222.

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 666531819396 + 1555570200625 = 816414^2 + 1247225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222102020021 - 2²⁷ = 2221967802293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222102019977 and 2222102020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222102020421) 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, 85465462296 + ... + 85465462321.

It is an arithmetic number, because the mean of its divisors is an integer number (598258236163).

Almost surely, 2^{2222102020021} is an apocalyptic number.

It is an amenable number.

2222102020021 is a deficient number, since it is larger than the sum of its proper divisors (170930924631).

2222102020021 is a wasteful number, since it uses less digits than its factorization.

2222102020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170930924630.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2222102020021 its reverse (1200202012222), we get a palindrome (3422304032243).

The spelling of 2222102020021 in words is "two trillion, two hundred twenty-two billion, one hundred two million, twenty thousand, twenty-one".