1311560264421 has 24 divisors (see below), whose sum is σ = 2068701862656. Its totient is φ = 794115455040.

The previous prime is 1311560264407. The next prime is 1311560264423. The reversal of 1311560264421 is 1244620651131.

1311560264421 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 5 + 6 + 0 + 2 + 644 + 2 + 1 = 666.

It is not a de Polignac number, because 1311560264421 - 2²³ = 1311551875813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311560264423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6310165 + ... + 6514698.

It is an arithmetic number, because the mean of its divisors is an integer number (86195910944).

Almost surely, 2^{1311560264421} is an apocalyptic number.

1311560264421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1311560264421 is a deficient number, since it is larger than the sum of its proper divisors (757141598235).

1311560264421 is a wasteful number, since it uses less digits than its factorization.

1311560264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12825913 (or 12825910 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1311560264421 in words is "one trillion, three hundred eleven billion, five hundred sixty million, two hundred sixty-four thousand, four hundred twenty-one".