20221000109 has 2 divisors, whose sum is σ = 20221000110. Its totient is φ = 20221000108.

The previous prime is 20221000069. The next prime is 20221000141. The reversal of 20221000109 is 90100012202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19823795209 + 397204900 = 140797^2 + 19930^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221000109 - 2²⁴ = 20204222893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221000169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110500054 + 10110500055.

It is an arithmetic number, because the mean of its divisors is an integer number (10110500055).

Almost surely, 2^20221000109 is an apocalyptic number.

It is an amenable number.

20221000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221000109 is an equidigital number, since it uses as much as digits as its factorization.

20221000109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20221000109 in words is "twenty billion, two hundred twenty-one million, one hundred nine", and thus it is an aban number.