71031223123321 has 4 divisors (see below), whose sum is σ = 71036321193892. Its totient is φ = 71026125052752.

The previous prime is 71031223123309. The next prime is 71031223123349. The reversal of 71031223123321 is 12332132213017.

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 68448568423225 + 2582654700096 = 8273365^2 + 1607064^2 .

It is a cyclic number.

It is not a de Polignac number, because 71031223123321 - 2⁷ = 71031223123193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71031223123121) 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, 2549014386 + ... + 2549042251.

It is an arithmetic number, because the mean of its divisors is an integer number (17759080298473).

Almost surely, 2^{71031223123321} is an apocalyptic number.

It is an amenable number.

71031223123321 is a deficient number, since it is larger than the sum of its proper divisors (5098070571).

71031223123321 is a wasteful number, since it uses less digits than its factorization.

71031223123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098070570.

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 71031223123321 its reverse (12332132213017), we get a palindrome (83363355336338).

The spelling of 71031223123321 in words is "seventy-one trillion, thirty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred twenty-one".