100221252 has 12 divisors (see below), whose sum is σ = 233849616. Its totient is φ = 33407080.

The previous prime is 100221227. The next prime is 100221259. The reversal of 100221252 is 252122001.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (100221259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175874 + ... + 4175897.

It is an arithmetic number, because the mean of its divisors is an integer number (19487468).

Almost surely, 2^100221252 is an apocalyptic number.

100221252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100221252 is an abundant number, since it is smaller than the sum of its proper divisors (133628364).

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

100221252 is a wasteful number, since it uses less digits than its factorization.

100221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351778 (or 8351776 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 100221252 is about 10011.0564877040. The cubic root of 100221252 is about 464.5009514785.

Adding to 100221252 its reverse (252122001), we get a palindrome (352343253).

The spelling of 100221252 in words is "one hundred million, two hundred twenty-one thousand, two hundred fifty-two".