22100111021 has 2 divisors, whose sum is σ = 22100111022. Its totient is φ = 22100111020.

The previous prime is 22100110943. The next prime is 22100111087. The reversal of 22100111021 is 12011100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11575608100 + 10524502921 = 107590^2 + 102589^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100111021 - 2¹⁴ = 22100094637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100110993 and 22100111011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100111521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050055510 + 11050055511.

It is an arithmetic number, because the mean of its divisors is an integer number (11050055511).

Almost surely, 2^22100111021 is an apocalyptic number.

It is an amenable number.

22100111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100111021 is an equidigital number, since it uses as much as digits as its factorization.

22100111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22100111021 its reverse (12011100122), we get a palindrome (34111211143).

The spelling of 22100111021 in words is "twenty-two billion, one hundred million, one hundred eleven thousand, twenty-one".