220111110021 has 32 divisors (see below), whose sum is σ = 323834443776. Its totient is φ = 131874440000.

The previous prime is 220111109951. The next prime is 220111110041. The reversal of 220111110021 is 120011111022.

It is a cyclic number.

It is not a de Polignac number, because 220111110021 - 2⁹ = 220111109509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220111109979 and 220111110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111110041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2105416 + ... + 2207486.

It is an arithmetic number, because the mean of its divisors is an integer number (10119826368).

Almost surely, 2^220111110021 is an apocalyptic number.

It is an amenable number.

220111110021 is a deficient number, since it is larger than the sum of its proper divisors (103723333755).

220111110021 is a wasteful number, since it uses less digits than its factorization.

220111110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102833.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 220111110021 its reverse (120011111022), we get a palindrome (340122221043).

The spelling of 220111110021 in words is "two hundred twenty billion, one hundred eleven million, one hundred ten thousand, twenty-one".