1231011423 has 12 divisors (see below), whose sum is σ = 1826185608. Its totient is φ = 798493680.

The previous prime is 1231011403. The next prime is 1231011427. The reversal of 1231011423 is 3241101321.

1231011423 is a `hidden beast` number, since 1 + 231 + 0 + 11 + 423 = 666.

It is not a de Polignac number, because 1231011423 - 2⁵ = 1231011391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231011396 and 1231011405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231011427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1848033 + ... + 1848698.

It is an arithmetic number, because the mean of its divisors is an integer number (152182134).

Almost surely, 2^1231011423 is an apocalyptic number.

1231011423 is a deficient number, since it is larger than the sum of its proper divisors (595174185).

1231011423 is a wasteful number, since it uses less digits than its factorization.

1231011423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696774 (or 3696771 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1231011423 is about 35085.7723728579. The cubic root of 1231011423 is about 1071.7348695401.

Adding to 1231011423 its reverse (3241101321), we get a palindrome (4472112744).

The spelling of 1231011423 in words is "one billion, two hundred thirty-one million, eleven thousand, four hundred twenty-three".