1231123342 has 4 divisors (see below), whose sum is σ = 1846685016. Its totient is φ = 615561670.

The previous prime is 1231123339. The next prime is 1231123349. The reversal of 1231123342 is 2433211321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2433211321 = 743 ⋅3274847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231123349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307780834 + ... + 307780837.

It is an arithmetic number, because the mean of its divisors is an integer number (461671254).

Almost surely, 2^1231123342 is an apocalyptic number.

1231123342 is a deficient number, since it is larger than the sum of its proper divisors (615561674).

1231123342 is an equidigital number, since it uses as much as digits as its factorization.

1231123342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615561673.

The product of its digits is 864, while the sum is 22.

The square root of 1231123342 is about 35087.3672708569. The cubic root of 1231123342 is about 1071.7673479443.

Adding to 1231123342 its reverse (2433211321), we get a palindrome (3664334663).

It can be divided in two parts, 12311 and 23342, that added together give a palindrome (35653).

The spelling of 1231123342 in words is "one billion, two hundred thirty-one million, one hundred twenty-three thousand, three hundred forty-two".