100102221 has 24 divisors (see below), whose sum is σ = 148193760. Its totient is φ = 65092896.

The previous prime is 100102217. The next prime is 100102253. The reversal of 100102221 is 122201001.

It is not a de Polignac number, because 100102221 - 2² = 100102217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64966 + ... + 66488.

It is an arithmetic number, because the mean of its divisors is an integer number (6174740).

Almost surely, 2^100102221 is an apocalyptic number.

It is an amenable number.

100102221 is a deficient number, since it is larger than the sum of its proper divisors (48091539).

100102221 is a wasteful number, since it uses less digits than its factorization.

100102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 100102221 is about 10005.1097445255. The cubic root of 100102221 is about 464.3169854530.

Adding to 100102221 its reverse (122201001), we get a palindrome (222303222).

The spelling of 100102221 in words is "one hundred million, one hundred two thousand, two hundred twenty-one".