221113123220 has 24 divisors (see below), whose sum is σ = 506550064608. Its totient is φ = 80404772000.

The previous prime is 221113123193. The next prime is 221113123237. The reversal of 221113123220 is 22321311122.

It is a super-3 number, since 3×221113123220³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221113123192 and 221113123201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502529606 + ... + 502530045.

It is an arithmetic number, because the mean of its divisors is an integer number (21106252692).

Almost surely, 2^221113123220 is an apocalyptic number.

221113123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221113123220 is an abundant number, since it is smaller than the sum of its proper divisors (285436941388).

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

221113123220 is a wasteful number, since it uses less digits than its factorization.

221113123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005059671 (or 1005059669 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221113123220 its reverse (22321311122), we get a palindrome (243434434342).

The spelling of 221113123220 in words is "two hundred twenty-one billion, one hundred thirteen million, one hundred twenty-three thousand, two hundred twenty".