221112020 has 24 divisors (see below), whose sum is σ = 475135584. Its totient is φ = 86387616.

The previous prime is 221112019. The next prime is 221112029. The reversal of 221112020 is 20211122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221111992 and 221112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112029) 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, 127694 + ... + 129413.

It is an arithmetic number, because the mean of its divisors is an integer number (19797316).

Almost surely, 2^221112020 is an apocalyptic number.

221112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112020 is an abundant number, since it is smaller than the sum of its proper divisors (254023564).

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

221112020 is a wasteful number, since it uses less digits than its factorization.

221112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257159 (or 257157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221112020 is about 14869.8359103253. The cubic root of 221112020 is about 604.6964941719.

Adding to 221112020 its reverse (20211122), we get a palindrome (241323142).

The spelling of 221112020 in words is "two hundred twenty-one million, one hundred twelve thousand, twenty".