22111723021 has 2 divisors, whose sum is σ = 22111723022. Its totient is φ = 22111723020.

The previous prime is 22111722973. The next prime is 22111723099. The reversal of 22111723021 is 12032711122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16131794121 + 5979928900 = 127011^2 + 77330^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111723021 - 2⁹ = 22111722509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111722983 and 22111723001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111753021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055861510 + 11055861511.

It is an arithmetic number, because the mean of its divisors is an integer number (11055861511).

Almost surely, 2^22111723021 is an apocalyptic number.

It is an amenable number.

22111723021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111723021 is an equidigital number, since it uses as much as digits as its factorization.

22111723021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The spelling of 22111723021 in words is "twenty-two billion, one hundred eleven million, seven hundred twenty-three thousand, twenty-one".