221100132 has 24 divisors (see below), whose sum is σ = 562800672. Its totient is φ = 67000000.

The previous prime is 221100107. The next prime is 221100133. The reversal of 221100132 is 231001122.

221100132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (221100133) 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, 837369 + ... + 837632.

It is an arithmetic number, because the mean of its divisors is an integer number (23450028).

Almost surely, 2^221100132 is an apocalyptic number.

221100132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221100132 is an abundant number, since it is smaller than the sum of its proper divisors (341700540).

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

221100132 is a wasteful number, since it uses less digits than its factorization.

221100132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675019 (or 1675017 counting only the distinct ones).

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

The square root of 221100132 is about 14869.4361695392. The cubic root of 221100132 is about 604.6856568887.

Adding to 221100132 its reverse (231001122), we get a palindrome (452101254).

The spelling of 221100132 in words is "two hundred twenty-one million, one hundred thousand, one hundred thirty-two".