22000110021 has 6 divisors (see below), whose sum is σ = 31777936710. Its totient is φ = 14666740008.

The previous prime is 22000109941. The next prime is 22000110049. The reversal of 22000110021 is 12001100022.

It can be written as a sum of positive squares in only one way, i.e., 15119407521 + 6880702500 = 122961^2 + 82950^2 .

It is not a de Polignac number, because 22000110021 - 2⁷ = 22000109893 is a prime.

It is a super-2 number, since 2×22000110021² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2444456669 = 22000110021 / (2 + 2 + 0 + 0 + 0 + 1 + 1 + 0 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 22000109985 and 22000110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000110071) 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, 1222228326 + ... + 1222228343.

It is an arithmetic number, because the mean of its divisors is an integer number (5296322785).

Almost surely, 2^22000110021 is an apocalyptic number.

It is an amenable number.

22000110021 is a deficient number, since it is larger than the sum of its proper divisors (9777826689).

22000110021 is a wasteful number, since it uses less digits than its factorization.

22000110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444456675 (or 2444456672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22000110021 its reverse (12001100022), we get a palindrome (34001210043).

Subtracting from 22000110021 its reverse (12001100022), we obtain a palindrome (9999009999).

The spelling of 22000110021 in words is "twenty-two billion, one hundred ten thousand, twenty-one".