22100032021 has 2 divisors, whose sum is σ = 22100032022. Its totient is φ = 22100032020.

The previous prime is 22100031997. The next prime is 22100032033. The reversal of 22100032021 is 12023000122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14953865796 + 7146166225 = 122286^2 + 84535^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100032021 - 2²⁷ = 21965814293 is a prime.

It is a super-2 number, since 2×22100032021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22100031992 and 22100032010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100732021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050016010 + 11050016011.

It is an arithmetic number, because the mean of its divisors is an integer number (11050016011).

Almost surely, 2^22100032021 is an apocalyptic number.

It is an amenable number.

22100032021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100032021 is an equidigital number, since it uses as much as digits as its factorization.

22100032021 is an evil number, because the sum of its binary digits is even.

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

Adding to 22100032021 its reverse (12023000122), we get a palindrome (34123032143).

The spelling of 22100032021 in words is "twenty-two billion, one hundred million, thirty-two thousand, twenty-one".