1321302775751 has 16 divisors (see below), whose sum is σ = 1512512870400. Its totient is φ = 1130707279680.

The previous prime is 1321302775721. The next prime is 1321302775769. The reversal of 1321302775751 is 1575772031231.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321302775751 is a prime.

It is a super-2 number, since 2×1321302775751² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321302775721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11035730 + ... + 11154816.

It is an arithmetic number, because the mean of its divisors is an integer number (94532054400).

Almost surely, 2^{1321302775751} is an apocalyptic number.

1321302775751 is a deficient number, since it is larger than the sum of its proper divisors (191210094649).

1321302775751 is a wasteful number, since it uses less digits than its factorization.

1321302775751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121654.

The product of its (nonzero) digits is 308700, while the sum is 44.

The spelling of 1321302775751 in words is "one trillion, three hundred twenty-one billion, three hundred two million, seven hundred seventy-five thousand, seven hundred fifty-one".