1312011123 has 16 divisors (see below), whose sum is σ = 1843345920. Its totient is φ = 827771616.

The previous prime is 1312011101. The next prime is 1312011203. The reversal of 1312011123 is 3211102131.

It is a happy number.

It is not a de Polignac number, because 1312011123 - 2⁸ = 1312010867 is a prime.

It is a super-2 number, since 2×1312011123² = 3442746373751442258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45286 + ... + 68372.

It is an arithmetic number, because the mean of its divisors is an integer number (115209120).

Almost surely, 2^1312011123 is an apocalyptic number.

1312011123 is a deficient number, since it is larger than the sum of its proper divisors (531334797).

1312011123 is a wasteful number, since it uses less digits than its factorization.

1312011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24106.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1312011123 is about 36221.6940934573. The cubic root of 1312011123 is about 1094.7438286504.

Adding to 1312011123 its reverse (3211102131), we get a palindrome (4523113254).

The spelling of 1312011123 in words is "one billion, three hundred twelve million, eleven thousand, one hundred twenty-three".