1311423123320 has 64 divisors (see below), whose sum is σ = 3058021693440. Its totient is φ = 505625040000.

The previous prime is 1311423123301. The next prime is 1311423123343. The reversal of 1311423123320 is 233213241131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311423123320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1795532 + ... + 2418011.

It is an arithmetic number, because the mean of its divisors is an integer number (47781588960).

Almost surely, 2^{1311423123320} is an apocalyptic number.

1311423123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311423123320 is an abundant number, since it is smaller than the sum of its proper divisors (1746598570120).

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

1311423123320 is a wasteful number, since it uses less digits than its factorization.

1311423123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213836 (or 4213832 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 1311423123320 its reverse (233213241131), we get a palindrome (1544636364451).

The spelling of 1311423123320 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, one hundred twenty-three thousand, three hundred twenty".