221110320 has 40 divisors (see below), whose sum is σ = 685442736. Its totient is φ = 58962688.

The previous prime is 221110289. The next prime is 221110349. The reversal of 221110320 is 23011122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×221110320² = 97779547221004800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221110296 and 221110305.

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, 460407 + ... + 460886.

Almost surely, 2^221110320 is an apocalyptic number.

221110320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110320 is an abundant number, since it is smaller than the sum of its proper divisors (464332416).

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

221110320 is a wasteful number, since it uses less digits than its factorization.

221110320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921309 (or 921303 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221110320 is about 14869.7787475134. The cubic root of 221110320 is about 604.6949444496.

Adding to 221110320 its reverse (23011122), we get a palindrome (244121442).

The spelling of 221110320 in words is "two hundred twenty-one million, one hundred ten thousand, three hundred twenty".