2001221021179 has 2 divisors, whose sum is σ = 2001221021180. Its totient is φ = 2001221021178.

The previous prime is 2001221021167. The next prime is 2001221021213. The reversal of 2001221021179 is 9711201221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001221021179 - 2¹¹ = 2001221019131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001221021879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610510589 + 1000610510590.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610510590).

Almost surely, 2^{2001221021179} is an apocalyptic number.

2001221021179 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001221021179 is an equidigital number, since it uses as much as digits as its factorization.

2001221021179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 2001221021179 in words is "two trillion, one billion, two hundred twenty-one million, twenty-one thousand, one hundred seventy-nine".