1312011123320 has 32 divisors (see below), whose sum is σ = 2968516803600. Its totient is φ = 521872578048.

The previous prime is 1312011123287. The next prime is 1312011123329. The reversal of 1312011123320 is 233211102131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1312011123292 and 1312011123301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312011123329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91613729 + ... + 91628048.

Almost surely, 2^{1312011123320} is an apocalyptic number.

1312011123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312011123320 is an abundant number, since it is smaller than the sum of its proper divisors (1656505680280).

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

1312011123320 is a wasteful number, since it uses less digits than its factorization.

1312011123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183241967 (or 183241963 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1312011123320 its reverse (233211102131), we get a palindrome (1545222225451).

It can be divided in two parts, 131201 and 1123320, that added together give a palindrome (1254521).

The spelling of 1312011123320 in words is "one trillion, three hundred twelve billion, eleven million, one hundred twenty-three thousand, three hundred twenty".