20102222209 has 2 divisors, whose sum is σ = 20102222210. Its totient is φ = 20102222208.

The previous prime is 20102222201. The next prime is 20102222251. The reversal of 20102222209 is 90222220102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19921911025 + 180311184 = 141145^2 + 13428^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102222209 - 2³ = 20102222201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102222209.

It is not a weakly prime, because it can be changed into another prime (20102222201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051111104 + 10051111105.

It is an arithmetic number, because the mean of its divisors is an integer number (10051111105).

Almost surely, 2^20102222209 is an apocalyptic number.

It is an amenable number.

20102222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102222209 is an equidigital number, since it uses as much as digits as its factorization.

20102222209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 20102222209 in words is "twenty billion, one hundred two million, two hundred twenty-two thousand, two hundred nine".