221021021112 has 32 divisors (see below), whose sum is σ = 585055645200. Its totient is φ = 69339928064.

The previous prime is 221021021083. The next prime is 221021021113. The reversal of 221021021112 is 211120120122.

It is a super-2 number, since 2×221021021112² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221021021091 and 221021021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021021113) 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, 270858687 + ... + 270859502.

Almost surely, 2^221021021112 is an apocalyptic number.

It is an amenable number.

221021021112 is an abundant number, since it is smaller than the sum of its proper divisors (364034624088).

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

221021021112 is a wasteful number, since it uses less digits than its factorization.

221021021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541718215 (or 541718211 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221021021112 its reverse (211120120122), we get a palindrome (432141141234).

It can be divided in two parts, 2210210 and 21112, that added together give a palindrome (2231322).

The spelling of 221021021112 in words is "two hundred twenty-one billion, twenty-one million, twenty-one thousand, one hundred twelve".