1311201111320 has 32 divisors (see below), whose sum is σ = 2952338904720. Its totient is φ = 524100639360.

The previous prime is 1311201111313. The next prime is 1311201111361. The reversal of 1311201111320 is 231111021131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11812982 + ... + 11923461.

Almost surely, 2^{1311201111320} is an apocalyptic number.

1311201111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311201111320 is an abundant number, since it is smaller than the sum of its proper divisors (1641137793400).

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

1311201111320 is a wasteful number, since it uses less digits than its factorization.

1311201111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23737835 (or 23737831 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1311201111320 its reverse (231111021131), we get a palindrome (1542312132451).

The spelling of 1311201111320 in words is "one trillion, three hundred eleven billion, two hundred one million, one hundred eleven thousand, three hundred twenty".