100231231 has 2 divisors, whose sum is σ = 100231232. Its totient is φ = 100231230.

The previous prime is 100231211. The next prime is 100231249. The reversal of 100231231 is 132132001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100231231 - 2¹¹ = 100229183 is a prime.

It is a super-2 number, since 2×100231231² = 20092599335550722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100231211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50115615 + 50115616.

It is an arithmetic number, because the mean of its divisors is an integer number (50115616).

Almost surely, 2^100231231 is an apocalyptic number.

100231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

100231231 is an equidigital number, since it uses as much as digits as its factorization.

100231231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 100231231 is about 10011.5548742441. The cubic root of 100231231 is about 464.5163677070.

Adding to 100231231 its reverse (132132001), we get a palindrome (232363232).

The spelling of 100231231 in words is "one hundred million, two hundred thirty-one thousand, two hundred thirty-one".