22021220113 has 8 divisors (see below), whose sum is σ = 23346920520. Its totient is φ = 20698890240.

The previous prime is 22021220063. The next prime is 22021220159. The reversal of 22021220113 is 31102212022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6637035024 + 15384185089 = 81468^2 + 124033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22021220113 - 2⁹ = 22021219601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021220813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829168 + ... + 855313.

It is an arithmetic number, because the mean of its divisors is an integer number (2918365065).

Almost surely, 2^22021220113 is an apocalyptic number.

It is an amenable number.

22021220113 is a deficient number, since it is larger than the sum of its proper divisors (1325700407).

22021220113 is a wasteful number, since it uses less digits than its factorization.

22021220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685267.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22021220113 its reverse (31102212022), we get a palindrome (53123432135).

The spelling of 22021220113 in words is "twenty-two billion, twenty-one million, two hundred twenty thousand, one hundred thirteen".