71012212200221 has 4 divisors (see below), whose sum is σ = 71239088277852. Its totient is φ = 70785336122592.

The previous prime is 71012212200071. The next prime is 71012212200233. The reversal of 71012212200221 is 12200221221017.

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 4915133340100 + 66097078860121 = 2217010^2 + 8130011^2 .

It is a cyclic number.

It is not a de Polignac number, because 71012212200221 - 2⁴² = 66614165689117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71012212203221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113438038346 + ... + 113438038971.

It is an arithmetic number, because the mean of its divisors is an integer number (17809772069463).

Almost surely, 2^{71012212200221} is an apocalyptic number.

It is an amenable number.

71012212200221 is a deficient number, since it is larger than the sum of its proper divisors (226876077631).

71012212200221 is a wasteful number, since it uses less digits than its factorization.

71012212200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226876077630.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 71012212200221 its reverse (12200221221017), we get a palindrome (83212433421238).

The spelling of 71012212200221 in words is "seventy-one trillion, twelve billion, two hundred twelve million, two hundred thousand, two hundred twenty-one".