971321122111 has 4 divisors (see below), whose sum is σ = 972831731032. Its totient is φ = 969810513192.

The previous prime is 971321122087. The next prime is 971321122117. The reversal of 971321122111 is 111221123179.

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 971321122111 - 2¹⁹ = 971320597823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971321122117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755303496 + ... + 755304781.

It is an arithmetic number, because the mean of its divisors is an integer number (243207932758).

Almost surely, 2^971321122111 is an apocalyptic number.

971321122111 is a deficient number, since it is larger than the sum of its proper divisors (1510608921).

971321122111 is a wasteful number, since it uses less digits than its factorization.

971321122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510608920.

The product of its digits is 1512, while the sum is 31.

The spelling of 971321122111 in words is "nine hundred seventy-one billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".