22000021021 has 16 divisors (see below), whose sum is σ = 24393374208. Its totient is φ = 19673508400.

The previous prime is 22000021013. The next prime is 22000021033. The reversal of 22000021021 is 12012000022.

It is a cyclic number.

It is not a de Polignac number, because 22000021021 - 2³ = 22000021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000020989 and 22000021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000021081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314190 + ... + 377776.

It is an arithmetic number, because the mean of its divisors is an integer number (1524585888).

Almost surely, 2^22000021021 is an apocalyptic number.

It is an amenable number.

22000021021 is a deficient number, since it is larger than the sum of its proper divisors (2393353187).

22000021021 is a wasteful number, since it uses less digits than its factorization.

22000021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64112.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22000021021 its reverse (12012000022), we get a palindrome (34012021043).

The spelling of 22000021021 in words is "twenty-two billion, twenty-one thousand, twenty-one".