22042410021 has 6 divisors (see below), whose sum is σ = 31839036710. Its totient is φ = 14694940008.

The previous prime is 22042409959. The next prime is 22042410029. The reversal of 22042410021 is 12001424022.

22042410021 is a `hidden beast` number, since 220 + 424 + 1 + 0 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21269013921 + 773396100 = 145839^2 + 27810^2 .

It is not a de Polignac number, because 22042410021 - 2⁶ = 22042409957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22042409976 and 22042410003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042410029) 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, 1224578326 + ... + 1224578343.

Almost surely, 2^22042410021 is an apocalyptic number.

It is an amenable number.

22042410021 is a deficient number, since it is larger than the sum of its proper divisors (9796626689).

22042410021 is a wasteful number, since it uses less digits than its factorization.

22042410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449156675 (or 2449156672 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22042410021 its reverse (12001424022), we get a palindrome (34043834043).

The spelling of 22042410021 in words is "twenty-two billion, forty-two million, four hundred ten thousand, twenty-one".