100021332 has 24 divisors (see below), whose sum is σ = 234142272. Its totient is φ = 33232000.

The previous prime is 100021331. The next prime is 100021333. The reversal of 100021332 is 233120001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100021331) and next prime (100021333).

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 (100021331) 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, 9669 + ... + 17132.

It is an arithmetic number, because the mean of its divisors is an integer number (9755928).

Almost surely, 2^100021332 is an apocalyptic number.

100021332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100021332 is an abundant number, since it is smaller than the sum of its proper divisors (134120940).

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

100021332 is a wasteful number, since it uses less digits than its factorization.

100021332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27119 (or 27117 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 100021332 is about 10001.0665431243. The cubic root of 100021332 is about 464.1918858057.

Adding to 100021332 its reverse (233120001), we get a palindrome (333141333).

The spelling of 100021332 in words is "one hundred million, twenty-one thousand, three hundred thirty-two".