2101022309 has 2 divisors, whose sum is σ = 2101022310. Its totient is φ = 2101022308.

The previous prime is 2101022291. The next prime is 2101022321. The reversal of 2101022309 is 9032201012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2077354084 + 23668225 = 45578^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101022309 - 2¹⁶ = 2100956773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101022359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050511154 + 1050511155.

It is an arithmetic number, because the mean of its divisors is an integer number (1050511155).

Almost surely, 2^2101022309 is an apocalyptic number.

It is an amenable number.

2101022309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101022309 is an equidigital number, since it uses as much as digits as its factorization.

2101022309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2101022309 is about 45836.9098980287. The cubic root of 2101022309 is about 1280.7869324837.

The spelling of 2101022309 in words is "two billion, one hundred one million, twenty-two thousand, three hundred nine".