1321734866267 has 4 divisors (see below), whose sum is σ = 1323934092936. Its totient is φ = 1319535639600.

The previous prime is 1321734866251. The next prime is 1321734866279. The reversal of 1321734866267 is 7626684371231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321734866267 - 2⁴ = 1321734866251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321734866227) 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, 1099612433 + ... + 1099613634.

It is an arithmetic number, because the mean of its divisors is an integer number (330983523234).

Almost surely, 2^{1321734866267} is an apocalyptic number.

1321734866267 is a deficient number, since it is larger than the sum of its proper divisors (2199226669).

1321734866267 is an equidigital number, since it uses as much as digits as its factorization.

1321734866267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199226668.

The product of its digits is 12192768, while the sum is 56.

The spelling of 1321734866267 in words is "one trillion, three hundred twenty-one billion, seven hundred thirty-four million, eight hundred sixty-six thousand, two hundred sixty-seven".