201021222179 has 2 divisors, whose sum is σ = 201021222180. Its totient is φ = 201021222178.

The previous prime is 201021222173. The next prime is 201021222203. The reversal of 201021222179 is 971222120102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021222179 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (201021222173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510611089 + 100510611090.

It is an arithmetic number, because the mean of its divisors is an integer number (100510611090).

Almost surely, 2^201021222179 is an apocalyptic number.

201021222179 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021222179 is an equidigital number, since it uses as much as digits as its factorization.

201021222179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 201021222179 in words is "two hundred one billion, twenty-one million, two hundred twenty-two thousand, one hundred seventy-nine".