111000020221 has 4 divisors (see below), whose sum is σ = 111107475292. Its totient is φ = 110892565152.

The previous prime is 111000020207. The next prime is 111000020231. The reversal of 111000020221 is 122020000111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122020000111 = 19 ⋅6422105269.

It can be written as a sum of positive squares in 2 ways, for example, as 110014939225 + 985080996 = 331685^2 + 31386^2 .

It is a cyclic number.

It is not a de Polignac number, because 111000020221 - 2²⁷ = 110865802493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111000020198 and 111000020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000020231) 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, 53725986 + ... + 53728051.

It is an arithmetic number, because the mean of its divisors is an integer number (27776868823).

Almost surely, 2^111000020221 is an apocalyptic number.

It is an amenable number.

111000020221 is a deficient number, since it is larger than the sum of its proper divisors (107455071).

111000020221 is a wasteful number, since it uses less digits than its factorization.

111000020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107455070.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111000020221 its reverse (122020000111), we get a palindrome (233020020332).

The spelling of 111000020221 in words is "one hundred eleven billion, twenty thousand, two hundred twenty-one".