180020102111 has 4 divisors (see below), whose sum is σ = 180025071072. Its totient is φ = 180015133152.

The previous prime is 180020102063. The next prime is 180020102131. The reversal of 180020102111 is 111201020081.

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 180020102111 - 2²² = 180015907807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 180020102111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180020102131) 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, 2429735 + ... + 2502728.

It is an arithmetic number, because the mean of its divisors is an integer number (45006267768).

Almost surely, 2^180020102111 is an apocalyptic number.

180020102111 is a deficient number, since it is larger than the sum of its proper divisors (4968961).

180020102111 is an equidigital number, since it uses as much as digits as its factorization.

180020102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968960.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 180020102111 its reverse (111201020081), we get a palindrome (291221122192).

The spelling of 180020102111 in words is "one hundred eighty billion, twenty million, one hundred two thousand, one hundred eleven".