20101102220209 has 2 divisors, whose sum is σ = 20101102220210. Its totient is φ = 20101102220208.

The previous prime is 20101102220081. The next prime is 20101102220281. The reversal of 20101102220209 is 90202220110102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18875549160000 + 1225553060209 = 4344600^2 + 1107047^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101102220209 - 2⁷ = 20101102220081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101102220209.

It is not a weakly prime, because it can be changed into another prime (20101102280209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050551110104 + 10050551110105.

It is an arithmetic number, because the mean of its divisors is an integer number (10050551110105).

Almost surely, 2^{20101102220209} is an apocalyptic number.

It is an amenable number.

20101102220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101102220209 is an equidigital number, since it uses as much as digits as its factorization.

20101102220209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20101102220209 in words is "twenty trillion, one hundred one billion, one hundred two million, two hundred twenty thousand, two hundred nine".