220102020191 has 4 divisors (see below), whose sum is σ = 223117116432. Its totient is φ = 217086923952.

The previous prime is 220102020181. The next prime is 220102020209. The reversal of 220102020191 is 191020201022.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220102020191 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 (220102020161) 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, 1507548011 + ... + 1507548156.

It is an arithmetic number, because the mean of its divisors is an integer number (55779279108).

Almost surely, 2^220102020191 is an apocalyptic number.

220102020191 is a deficient number, since it is larger than the sum of its proper divisors (3015096241).

220102020191 is an equidigital number, since it uses as much as digits as its factorization.

220102020191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015096240.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 220102020191 in words is "two hundred twenty billion, one hundred two million, twenty thousand, one hundred ninety-one".