22031220113 has 6 divisors (see below), whose sum is σ = 25628154066. Its totient is φ = 18883902912.

The previous prime is 22031220103. The next prime is 22031220137. The reversal of 22031220113 is 31102213022.

It can be written as a sum of positive squares in only one way, i.e., 13897344769 + 8133875344 = 117887^2 + 90188^2 .

It is not a de Polignac number, because 22031220113 - 2¹⁸ = 22030957969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22031220091 and 22031220100.

It is not an unprimeable number, because it can be changed into a prime (22031220103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224808320 + ... + 224808417.

It is an arithmetic number, because the mean of its divisors is an integer number (4271359011).

Almost surely, 2^22031220113 is an apocalyptic number.

It is an amenable number.

22031220113 is a deficient number, since it is larger than the sum of its proper divisors (3596933953).

22031220113 is an equidigital number, since it uses as much as digits as its factorization.

22031220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449616751 (or 449616744 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22031220113 its reverse (31102213022), we get a palindrome (53133433135).

The spelling of 22031220113 in words is "twenty-two billion, thirty-one million, two hundred twenty thousand, one hundred thirteen".