971231120033 has 4 divisors (see below), whose sum is σ = 1004721848340. Its totient is φ = 937740391728.

The previous prime is 971231119961. The next prime is 971231120077. The reversal of 971231120033 is 330021132179.

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

It can be written as a sum of positive squares in 2 ways, for example, as 375074179489 + 596156940544 = 612433^2 + 772112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971231120033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971231120633) 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, 16745364110 + ... + 16745364167.

It is an arithmetic number, because the mean of its divisors is an integer number (251180462085).

Almost surely, 2^971231120033 is an apocalyptic number.

It is an amenable number.

971231120033 is a deficient number, since it is larger than the sum of its proper divisors (33490728307).

971231120033 is a wasteful number, since it uses less digits than its factorization.

971231120033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33490728306.

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 971231120033 in words is "nine hundred seventy-one billion, two hundred thirty-one million, one hundred twenty thousand, thirty-three".