22102300021 has 4 divisors (see below), whose sum is σ = 22103611372. Its totient is φ = 22100988672.

The previous prime is 22102300013. The next prime is 22102300039. The reversal of 22102300021 is 12000320122.

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 4912467921 + 17189832100 = 70089^2 + 131110^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102300021 - 2³ = 22102300013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102299974 and 22102300010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102300621) 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, 630060 + ... + 664213.

It is an arithmetic number, because the mean of its divisors is an integer number (5525902843).

Almost surely, 2^22102300021 is an apocalyptic number.

It is an amenable number.

22102300021 is a deficient number, since it is larger than the sum of its proper divisors (1311351).

22102300021 is a wasteful number, since it uses less digits than its factorization.

22102300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311350.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22102300021 its reverse (12000320122), we get a palindrome (34102620143).

The spelling of 22102300021 in words is "twenty-two billion, one hundred two million, three hundred thousand, twenty-one".