1000123231 has 2 divisors, whose sum is σ = 1000123232. Its totient is φ = 1000123230.

The previous prime is 1000123217. The next prime is 1000123247. The reversal of 1000123231 is 1323210001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000123231 - 2¹⁵ = 1000090463 is a prime.

It is a super-2 number, since 2×1000123231² = 2000492954371758722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000123031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500061615 + 500061616.

It is an arithmetic number, because the mean of its divisors is an integer number (500061616).

Almost surely, 2^1000123231 is an apocalyptic number.

1000123231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000123231 is an equidigital number, since it uses as much as digits as its factorization.

1000123231 is an evil number, because the sum of its binary digits is even.

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

The square root of 1000123231 is about 31624.7249948517. The cubic root of 1000123231 is about 1000.0410753128.

Adding to 1000123231 its reverse (1323210001), we get a palindrome (2323333232).

The spelling of 1000123231 in words is "one billion, one hundred twenty-three thousand, two hundred thirty-one".