100231223221 has 4 divisors (see below), whose sum is σ = 102675887244. Its totient is φ = 97786559200.

The previous prime is 100231223201. The next prime is 100231223251. The reversal of 100231223221 is 122322132001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37987959025 + 62243264196 = 194905^2 + 249486^2 .

It is a cyclic number.

It is not a de Polignac number, because 100231223221 - 2⁵ = 100231223189 is a prime.

It is a super-2 number, since 2×100231223221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100231223201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222331950 + ... + 1222332031.

It is an arithmetic number, because the mean of its divisors is an integer number (25668971811).

Almost surely, 2^100231223221 is an apocalyptic number.

It is an amenable number.

100231223221 is a deficient number, since it is larger than the sum of its proper divisors (2444664023).

100231223221 is an equidigital number, since it uses as much as digits as its factorization.

100231223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444664022.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 100231223221 its reverse (122322132001), we get a palindrome (222553355222).

The spelling of 100231223221 in words is "one hundred billion, two hundred thirty-one million, two hundred twenty-three thousand, two hundred twenty-one".