1312011120 has 160 divisors (see below), whose sum is σ = 4774123008. Its totient is φ = 291769344.

The previous prime is 1312011101. The next prime is 1312011203. The reversal of 1312011120 is 211102131.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1312011096 and 1312011105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51607 + ... + 72713.

Almost surely, 2^1312011120 is an apocalyptic number.

1312011120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312011120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387061504).

1312011120 is an abundant number, since it is smaller than the sum of its proper divisors (3462111888).

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

1312011120 is a wasteful number, since it uses less digits than its factorization.

1312011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21167 (or 21161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1312011120 is about 36221.6940520457. The cubic root of 1312011120 is about 1094.7438278160.

Adding to 1312011120 its reverse (211102131), we get a palindrome (1523113251).

It can be divided in two parts, 1312011 and 120, that added together give a palindrome (1312131).

The spelling of 1312011120 in words is "one billion, three hundred twelve million, eleven thousand, one hundred twenty".