1231253122 has 16 divisors (see below), whose sum is σ = 2019146112. Its totient is φ = 558447120.

The previous prime is 1231253119. The next prime is 1231253137. The reversal of 1231253122 is 2213521321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1231253093 and 1231253102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50253 + ... + 70624.

It is an arithmetic number, because the mean of its divisors is an integer number (126196632).

Almost surely, 2^1231253122 is an apocalyptic number.

1231253122 is a deficient number, since it is larger than the sum of its proper divisors (787892990).

1231253122 is a wasteful number, since it uses less digits than its factorization.

1231253122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121353.

The product of its digits is 720, while the sum is 22.

The square root of 1231253122 is about 35089.2166056753. The cubic root of 1231253122 is about 1071.8050070682.

Adding to 1231253122 its reverse (2213521321), we get a palindrome (3444774443).

The spelling of 1231253122 in words is "one billion, two hundred thirty-one million, two hundred fifty-three thousand, one hundred twenty-two".