20102201022209 has 4 divisors (see below), whose sum is σ = 20131894082004. Its totient is φ = 20072507962416.

The previous prime is 20102201022179. The next prime is 20102201022227. The reversal of 20102201022209 is 90222010220102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12633475009600 + 7468726012609 = 3554360^2 + 2732897^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102201022209 - 2²⁴ = 20102184244993 is a prime.

It is a super-2 number, since 2×20102201022209² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102201022509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14846528882 + ... + 14846530235.

It is an arithmetic number, because the mean of its divisors is an integer number (5032973520501).

Almost surely, 2^{20102201022209} is an apocalyptic number.

It is an amenable number.

20102201022209 is a deficient number, since it is larger than the sum of its proper divisors (29693059795).

20102201022209 is an equidigital number, since it uses as much as digits as its factorization.

20102201022209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29693059794.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 20102201022209 in words is "twenty trillion, one hundred two billion, two hundred one million, twenty-two thousand, two hundred nine".