100023221 has 2 divisors, whose sum is σ = 100023222. Its totient is φ = 100023220.

The previous prime is 100023139. The next prime is 100023269. The reversal of 100023221 is 122320001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 8916196 = 9545^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 100023221 - 2²² = 95828917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100023271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50011610 + 50011611.

It is an arithmetic number, because the mean of its divisors is an integer number (50011611).

Almost surely, 2^100023221 is an apocalyptic number.

It is an amenable number.

100023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100023221 is an equidigital number, since it uses as much as digits as its factorization.

100023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 100023221 is about 10001.1609826060. The cubic root of 100023221 is about 464.1948080255.

Adding to 100023221 its reverse (122320001), we get a palindrome (222343222).

The spelling of 100023221 in words is "one hundred million, twenty-three thousand, two hundred twenty-one".