201221210102179 has 2 divisors, whose sum is σ = 201221210102180. Its totient is φ = 201221210102178.

The previous prime is 201221210102173. The next prime is 201221210102183. The reversal of 201221210102179 is 971201012122102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201221210102179 - 2⁷ = 201221210102051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201221210102179.

It is not a weakly prime, because it can be changed into another prime (201221210102173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610605051089 + 100610605051090.

It is an arithmetic number, because the mean of its divisors is an integer number (100610605051090).

Almost surely, 2^{201221210102179} is an apocalyptic number.

201221210102179 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221210102179 is an equidigital number, since it uses as much as digits as its factorization.

201221210102179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 201221210102179 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred ten million, one hundred two thousand, one hundred seventy-nine".