1121287766567 has 4 divisors (see below), whose sum is σ = 1123037046096. Its totient is φ = 1119538487040.

The previous prime is 1121287766563. The next prime is 1121287766579. The reversal of 1121287766567 is 7656677821211.

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 1121287766567 - 2² = 1121287766563 is a prime.

It is a super-2 number, since 2×1121287766567² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121287766561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874638803 + ... + 874640084.

It is an arithmetic number, because the mean of its divisors is an integer number (280759261524).

Almost surely, 2^{1121287766567} is an apocalyptic number.

1121287766567 is a deficient number, since it is larger than the sum of its proper divisors (1749279529).

1121287766567 is an equidigital number, since it uses as much as digits as its factorization.

1121287766567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749279528.

The product of its digits is 11854080, while the sum is 59.

The spelling of 1121287766567 in words is "one trillion, one hundred twenty-one billion, two hundred eighty-seven million, seven hundred sixty-six thousand, five hundred sixty-seven".