10971322987 has 4 divisors (see below), whose sum is σ = 10971806176. Its totient is φ = 10970839800.

The previous prime is 10971322939. The next prime is 10971323009. The reversal of 10971322987 is 78922317901.

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 10971322987 - 2¹¹ = 10971320939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10971322987.

It is not an unprimeable number, because it can be changed into a prime (10971322927) 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, 205764 + ... + 253537.

It is an arithmetic number, because the mean of its divisors is an integer number (2742951544).

Almost surely, 2^10971322987 is an apocalyptic number.

10971322987 is a deficient number, since it is larger than the sum of its proper divisors (483189).

10971322987 is an equidigital number, since it uses as much as digits as its factorization.

10971322987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483188.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 10971322987 in words is "ten billion, nine hundred seventy-one million, three hundred twenty-two thousand, nine hundred eighty-seven".