100322221 has 4 divisors (see below), whose sum is σ = 101696572. Its totient is φ = 98947872.

The previous prime is 100322149. The next prime is 100322227. The reversal of 100322221 is 122223001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122223001 = 191 ⋅639911.

It can be written as a sum of positive squares in 2 ways, for example, as 54908100 + 45414121 = 7410^2 + 6739^2 .

It is a cyclic number.

It is not a de Polignac number, because 100322221 - 2⁷ = 100322093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100322227) 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, 687066 + ... + 687211.

It is an arithmetic number, because the mean of its divisors is an integer number (25424143).

Almost surely, 2^100322221 is an apocalyptic number.

It is an amenable number.

100322221 is a deficient number, since it is larger than the sum of its proper divisors (1374351).

100322221 is an equidigital number, since it uses as much as digits as its factorization.

100322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374350.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 100322221 is about 10016.0980925708. The cubic root of 100322221 is about 464.6568879837.

Adding to 100322221 its reverse (122223001), we get a palindrome (222545222).

The spelling of 100322221 in words is "one hundred million, three hundred twenty-two thousand, two hundred twenty-one".