100223021 has 2 divisors, whose sum is σ = 100223022. Its totient is φ = 100223020.

The previous prime is 100223009. The next prime is 100223027. The reversal of 100223021 is 120322001.

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., 97022500 + 3200521 = 9850^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 100223021 - 2²⁶ = 33114157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 100222993 and 100223011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100223027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50111510 + 50111511.

It is an arithmetic number, because the mean of its divisors is an integer number (50111511).

Almost surely, 2^100223021 is an apocalyptic number.

It is an amenable number.

100223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100223021 is an equidigital number, since it uses as much as digits as its factorization.

100223021 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 100223021 is about 10011.1448396275. The cubic root of 100223021 is about 464.5036844230.

Adding to 100223021 its reverse (120322001), we get a palindrome (220545022).

The spelling of 100223021 in words is "one hundred million, two hundred twenty-three thousand, twenty-one".