1231123122 has 24 divisors (see below), whose sum is σ = 2668184064. Its totient is φ = 410258904.

The previous prime is 1231123081. The next prime is 1231123133. The reversal of 1231123122 is 2213211321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1231123095 and 1231123104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77383 + ... + 91925.

It is an arithmetic number, because the mean of its divisors is an integer number (111174336).

Almost surely, 2^1231123122 is an apocalyptic number.

1231123122 is an abundant number, since it is smaller than the sum of its proper divisors (1437060942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231123122 is a wasteful number, since it uses less digits than its factorization.

1231123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19254 (or 19251 counting only the distinct ones).

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

The square root of 1231123122 is about 35087.3641358253. The cubic root of 1231123122 is about 1071.7672841032.

Adding to 1231123122 its reverse (2213211321), we get a palindrome (3444334443).

The spelling of 1231123122 in words is "one billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-two".