22100020100021 has 2 divisors, whose sum is σ = 22100020100022. Its totient is φ = 22100020100020.

The previous prime is 22100020099979. The next prime is 22100020100063. The reversal of 22100020100021 is 12000102000122.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (22100020099979) and next prime (22100020100063).

It can be written as a sum of positive squares in only one way, i.e., 16576175818225 + 5523844281796 = 4071385^2 + 2350286^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100020100021 - 2²⁶ = 22099952991157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100020099975 and 22100020100011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100020000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050010050010 + 11050010050011.

It is an arithmetic number, because the mean of its divisors is an integer number (11050010050011).

Almost surely, 2^{22100020100021} is an apocalyptic number.

It is an amenable number.

22100020100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100020100021 is an equidigital number, since it uses as much as digits as its factorization.

22100020100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22100020100021 its reverse (12000102000122), we get a palindrome (34100122100143).

The spelling of 22100020100021 in words is "twenty-two trillion, one hundred billion, twenty million, one hundred thousand, twenty-one".