971344300021 has 4 divisors (see below), whose sum is σ = 971467998732. Its totient is φ = 971220601312.

The previous prime is 971344299967. The next prime is 971344300027. The reversal of 971344300021 is 120003443179.

971344300021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 127242737521 + 844101562500 = 356711^2 + 918750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971344300021 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 971344300021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971344300027) 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, 61837576 + ... + 61853281.

It is an arithmetic number, because the mean of its divisors is an integer number (242866999683).

Almost surely, 2^971344300021 is an apocalyptic number.

It is an amenable number.

971344300021 is a deficient number, since it is larger than the sum of its proper divisors (123698711).

971344300021 is a wasteful number, since it uses less digits than its factorization.

971344300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123698710.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 971344300021 in words is "nine hundred seventy-one billion, three hundred forty-four million, three hundred thousand, twenty-one".