2221222110021 has 24 divisors (see below), whose sum is σ = 3270655964160. Its totient is φ = 1452314354400.

The previous prime is 2221222110013. The next prime is 2221222110031. The reversal of 2221222110021 is 1200112221222.

It is a happy number.

It is not a de Polignac number, because 2221222110021 - 2³ = 2221222110013 is a prime.

It is a super-2 number, since 2×2221222110021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221222109976 and 2221222110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221222110011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8977666 + ... + 9221763.

It is an arithmetic number, because the mean of its divisors is an integer number (136277331840).

Almost surely, 2^{2221222110021} is an apocalyptic number.

It is an amenable number.

2221222110021 is a deficient number, since it is larger than the sum of its proper divisors (1049433854139).

2221222110021 is a wasteful number, since it uses less digits than its factorization.

2221222110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18199697 (or 18199694 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221222110021 its reverse (1200112221222), we get a palindrome (3421334331243).

The spelling of 2221222110021 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".