220000111121 has 4 divisors (see below), whose sum is σ = 251428698432. Its totient is φ = 188571523812.

The previous prime is 220000111117. The next prime is 220000111159. The reversal of 220000111121 is 121111000022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 220000111121 - 2² = 220000111117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220000111171) 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, 15714293645 + ... + 15714293658.

It is an arithmetic number, because the mean of its divisors is an integer number (62857174608).

Almost surely, 2^220000111121 is an apocalyptic number.

It is an amenable number.

220000111121 is a deficient number, since it is larger than the sum of its proper divisors (31428587311).

220000111121 is an equidigital number, since it uses as much as digits as its factorization.

220000111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31428587310.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 220000111121 its reverse (121111000022), we get a palindrome (341111111143).

It can be divided in two parts, 2200001 and 11121, that added together give a palindrome (2211122).

The spelling of 220000111121 in words is "two hundred twenty billion, one hundred eleven thousand, one hundred twenty-one".