221210132 has 24 divisors (see below), whose sum is σ = 454796832. Its totient is φ = 92815200.

The previous prime is 221210131. The next prime is 221210167. The reversal of 221210132 is 231012122.

It is a happy number.

221210132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210131) 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, 192794 + ... + 193937.

It is an arithmetic number, because the mean of its divisors is an integer number (18949868).

Almost surely, 2^221210132 is an apocalyptic number.

221210132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221210132 is an abundant number, since it is smaller than the sum of its proper divisors (233586700).

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

221210132 is a wasteful number, since it uses less digits than its factorization.

221210132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386759 (or 386757 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221210132 is about 14873.1345721068. The cubic root of 221210132 is about 604.7859197484.

Adding to 221210132 its reverse (231012122), we get a palindrome (452222254).

The spelling of 221210132 in words is "two hundred twenty-one million, two hundred ten thousand, one hundred thirty-two".