1311230623216 has 20 divisors (see below), whose sum is σ = 2674220350600. Its totient is φ = 621109242432.

The previous prime is 1311230623211. The next prime is 1311230623243. The reversal of 1311230623216 is 6123260321131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311230623211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156629011 + ... + 2156629618.

It is an arithmetic number, because the mean of its divisors is an integer number (133711017530).

Almost surely, 2^{1311230623216} is an apocalyptic number.

1311230623216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311230623216 is an abundant number, since it is smaller than the sum of its proper divisors (1362989727384).

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

1311230623216 is a wasteful number, since it uses less digits than its factorization.

1311230623216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313258656 (or 4313258650 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 1311230623216 its reverse (6123260321131), we get a palindrome (7434490944347).

The spelling of 1311230623216 in words is "one trillion, three hundred eleven billion, two hundred thirty million, six hundred twenty-three thousand, two hundred sixteen".