1312122135 has 24 divisors (see below), whose sum is σ = 2230160976. Its totient is φ = 658631680.

The previous prime is 1312122073. The next prime is 1312122179. The reversal of 1312122135 is 5312212131.

It is not a de Polignac number, because 1312122135 - 2⁸ = 1312121879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147006 + ... + 155675.

It is an arithmetic number, because the mean of its divisors is an integer number (92923374).

Almost surely, 2^1312122135 is an apocalyptic number.

1312122135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312122135 is a deficient number, since it is larger than the sum of its proper divisors (918038841).

1312122135 is a wasteful number, since it uses less digits than its factorization.

1312122135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302723 (or 302706 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 1312122135 is about 36223.2264576197. The cubic root of 1312122135 is about 1094.7747039665.

Adding to 1312122135 its reverse (5312212131), we get a palindrome (6624334266).

The spelling of 1312122135 in words is "one billion, three hundred twelve million, one hundred twenty-two thousand, one hundred thirty-five".