71193031982021 has 2 divisors, whose sum is σ = 71193031982022. Its totient is φ = 71193031982020.

The previous prime is 71193031981999. The next prime is 71193031982041. The reversal of 71193031982021 is 12028913039117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48880918437121 + 22312113544900 = 6991489^2 + 4723570^2 .

It is a cyclic number.

It is not a de Polignac number, because 71193031982021 - 2⁶ = 71193031981957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71193031982041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35596515991010 + 35596515991011.

It is an arithmetic number, because the mean of its divisors is an integer number (35596515991011).

Almost surely, 2^{71193031982021} is an apocalyptic number.

It is an amenable number.

71193031982021 is a deficient number, since it is larger than the sum of its proper divisors (1).

71193031982021 is an equidigital number, since it uses as much as digits as its factorization.

71193031982021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 71193031982021 in words is "seventy-one trillion, one hundred ninety-three billion, thirty-one million, nine hundred eighty-two thousand, twenty-one".