220011111021 has 24 divisors (see below), whose sum is σ = 333415538400. Its totient is φ = 128265578784.

The previous prime is 220011111007. The next prime is 220011111049. The reversal of 220011111021 is 120111110022.

It is a de Polignac number, because none of the positive numbers 2^k-220011111021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220011110988 and 220011111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011111121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7799371 + ... + 7827528.

It is an arithmetic number, because the mean of its divisors is an integer number (13892314100).

Almost surely, 2^220011111021 is an apocalyptic number.

It is an amenable number.

220011111021 is a deficient number, since it is larger than the sum of its proper divisors (113404427379).

220011111021 is a wasteful number, since it uses less digits than its factorization.

220011111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15626953 (or 15626934 counting only the distinct ones).

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

Adding to 220011111021 its reverse (120111110022), we get a palindrome (340122221043).

Subtracting from 220011111021 its reverse (120111110022), we obtain a palindrome (99900000999).

The spelling of 220011111021 in words is "two hundred twenty billion, eleven million, one hundred eleven thousand, twenty-one".