71422313021 has 2 divisors, whose sum is σ = 71422313022. Its totient is φ = 71422313020.

The previous prime is 71422313009. The next prime is 71422313029. The reversal of 71422313021 is 12031322417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67311708025 + 4110604996 = 259445^2 + 64114^2 .

It is an emirp because it is prime and its reverse (12031322417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71422313021 - 2³⁴ = 54242443837 is a prime.

It is a super-2 number, since 2×71422313021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71422313029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35711156510 + 35711156511.

It is an arithmetic number, because the mean of its divisors is an integer number (35711156511).

Almost surely, 2^71422313021 is an apocalyptic number.

It is an amenable number.

71422313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

71422313021 is an equidigital number, since it uses as much as digits as its factorization.

71422313021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 71422313021 its reverse (12031322417), we get a palindrome (83453635438).

The spelling of 71422313021 in words is "seventy-one billion, four hundred twenty-two million, three hundred thirteen thousand, twenty-one".