422100000021 has 32 divisors (see below), whose sum is σ = 650972786688. Its totient is φ = 238295534400.

The previous prime is 422100000017. The next prime is 422100000079. The reversal of 422100000021 is 120000001224.

It is not a de Polignac number, because 422100000021 - 2² = 422100000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 422099999952 and 422100000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422100005021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 767110 + ... + 1196936.

It is an arithmetic number, because the mean of its divisors is an integer number (20342899584).

Almost surely, 2^422100000021 is an apocalyptic number.

It is an amenable number.

422100000021 is a deficient number, since it is larger than the sum of its proper divisors (228872786667).

422100000021 is a wasteful number, since it uses less digits than its factorization.

422100000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430401.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 422100000021 its reverse (120000001224), we get a palindrome (542100001245).

The spelling of 422100000021 in words is "four hundred twenty-two billion, one hundred million, twenty-one", and thus it is an aban number.