100021231 has 2 divisors, whose sum is σ = 100021232. Its totient is φ = 100021230.

The previous prime is 100021223. The next prime is 100021237. The reversal of 100021231 is 132120001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100021231 - 2³ = 100021223 is a prime.

It is a super-2 number, since 2×100021231² = 20008493301510722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010615 + 50010616.

It is an arithmetic number, because the mean of its divisors is an integer number (50010616).

Almost surely, 2^100021231 is an apocalyptic number.

100021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021231 is an equidigital number, since it uses as much as digits as its factorization.

100021231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100021231 is about 10001.0614936616. The cubic root of 100021231 is about 464.1917295610.

Adding to 100021231 its reverse (132120001), we get a palindrome (232141232).

The spelling of 100021231 in words is "one hundred million, twenty-one thousand, two hundred thirty-one".