101002221209 has 2 divisors, whose sum is σ = 101002221210. Its totient is φ = 101002221208.

The previous prime is 101002221181. The next prime is 101002221223. The reversal of 101002221209 is 902122200101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81926467984 + 19075753225 = 286228^2 + 138115^2 .

It is a cyclic number.

It is not a de Polignac number, because 101002221209 - 2¹⁶ = 101002155673 is a prime.

It is not a weakly prime, because it can be changed into another prime (101002241209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50501110604 + 50501110605.

It is an arithmetic number, because the mean of its divisors is an integer number (50501110605).

Almost surely, 2^101002221209 is an apocalyptic number.

It is an amenable number.

101002221209 is a deficient number, since it is larger than the sum of its proper divisors (1).

101002221209 is an equidigital number, since it uses as much as digits as its factorization.

101002221209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 101002221209 in words is "one hundred one billion, two million, two hundred twenty-one thousand, two hundred nine".