100021223 has 2 divisors, whose sum is σ = 100021224. Its totient is φ = 100021222.

The previous prime is 100021199. The next prime is 100021231. The reversal of 100021223 is 322120001.

It is a happy number.

100021223 is nontrivially palindromic in base 3.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100021223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010611 + 50010612.

It is an arithmetic number, because the mean of its divisors is an integer number (50010612).

Almost surely, 2^100021223 is an apocalyptic number.

100021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021223 is an equidigital number, since it uses as much as digits as its factorization.

100021223 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 100021223 is about 10001.0610937040. The cubic root of 100021223 is about 464.1917171852.

Adding to 100021223 its reverse (322120001), we get a palindrome (422141224).

The spelling of 100021223 in words is "one hundred million, twenty-one thousand, two hundred twenty-three".