220021112021 has 16 divisors (see below), whose sum is σ = 226234081920. Its totient is φ = 213860122560.

The previous prime is 220021112011. The next prime is 220021112023. The reversal of 220021112021 is 120211120022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220021112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220021111987 and 220021112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021112023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8920376 + ... + 8945006.

It is an arithmetic number, because the mean of its divisors is an integer number (14139630120).

Almost surely, 2^220021112021 is an apocalyptic number.

It is an amenable number.

220021112021 is a deficient number, since it is larger than the sum of its proper divisors (6212969899).

220021112021 is a wasteful number, since it uses less digits than its factorization.

220021112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25676.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220021112021 its reverse (120211120022), we get a palindrome (340232232043).

The spelling of 220021112021 in words is "two hundred twenty billion, twenty-one million, one hundred twelve thousand, twenty-one".