221120111000020 has 24 divisors (see below), whose sum is σ = 464352967550304. Its totient is φ = 88447904504736.

The previous prime is 221120111000011. The next prime is 221120111000023. The reversal of 221120111000020 is 20000111021122.

221120111000020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221120111000020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120111000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4723467 + ... + 21553453.

It is an arithmetic number, because the mean of its divisors is an integer number (19348040314596).

Almost surely, 2^{221120111000020} is an apocalyptic number.

221120111000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120111000020 is an abundant number, since it is smaller than the sum of its proper divisors (243232856550284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221120111000020 is a wasteful number, since it uses less digits than its factorization.

221120111000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17486919 (or 17486917 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221120111000020 its reverse (20000111021122), we get a palindrome (241120222021142).

The spelling of 221120111000020 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred eleven million, twenty", and thus it is an aban number.