71641114421221 has 4 divisors (see below), whose sum is σ = 71660888400672. Its totient is φ = 71621340441772.

The previous prime is 71641114421141. The next prime is 71641114421231. The reversal of 71641114421221 is 12212441114617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71641114421221 - 2⁴¹ = 69442091165669 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 (71641114421231) 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, 9886984291 + ... + 9886991536.

It is an arithmetic number, because the mean of its divisors is an integer number (17915222100168).

Almost surely, 2^{71641114421221} is an apocalyptic number.

It is an amenable number.

71641114421221 is a deficient number, since it is larger than the sum of its proper divisors (19773979451).

71641114421221 is a wasteful number, since it uses less digits than its factorization.

71641114421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19773979450.

The product of its digits is 21504, while the sum is 37.

Adding to 71641114421221 its reverse (12212441114617), we get a palindrome (83853555535838).

The spelling of 71641114421221 in words is "seventy-one trillion, six hundred forty-one billion, one hundred fourteen million, four hundred twenty-one thousand, two hundred twenty-one".