221010132 has 48 divisors (see below), whose sum is σ = 624032640. Its totient is φ = 59430912.

The previous prime is 221010113. The next prime is 221010133. The reversal of 221010132 is 231010122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75957 + ... + 78812.

It is an arithmetic number, because the mean of its divisors is an integer number (13000680).

Almost surely, 2^221010132 is an apocalyptic number.

It is an amenable number.

221010132 is an abundant number, since it is smaller than the sum of its proper divisors (403022508).

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

221010132 is a wasteful number, since it uses less digits than its factorization.

221010132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154800 (or 154798 counting only the distinct ones).

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

The square root of 221010132 is about 14866.4095194502. The cubic root of 221010132 is about 604.6035989021.

Adding to 221010132 its reverse (231010122), we get a palindrome (452020254).

The spelling of 221010132 in words is "two hundred twenty-one million, ten thousand, one hundred thirty-two".