201020220121999 has 4 divisors (see below), whose sum is σ = 201020315310864. Its totient is φ = 201020124933136.

The previous prime is 201020220121993. The next prime is 201020220122017. The reversal of 201020220121999 is 999121022020102.

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

It is a cyclic number.

It is not a de Polignac number, because 201020220121999 - 2⁷ = 201020220121871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020220121993) 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, 44353147 + ... + 48674860.

It is an arithmetic number, because the mean of its divisors is an integer number (50255078827716).

Almost surely, 2^{201020220121999} is an apocalyptic number.

201020220121999 is a deficient number, since it is larger than the sum of its proper divisors (95188865).

201020220121999 is an equidigital number, since it uses as much as digits as its factorization.

201020220121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95188864.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 201020220121999 in words is "two hundred one trillion, twenty billion, two hundred twenty million, one hundred twenty-one thousand, nine hundred ninety-nine".