73101312221 has 4 divisors (see below), whose sum is σ = 83544356832. Its totient is φ = 62658267612.

The previous prime is 73101312191. The next prime is 73101312239. The reversal of 73101312221 is 12221310137.

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 73101312221 - 2¹⁰ = 73101311197 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 (73101311221) 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, 5221522295 + ... + 5221522308.

It is an arithmetic number, because the mean of its divisors is an integer number (20886089208).

Almost surely, 2^73101312221 is an apocalyptic number.

It is an amenable number.

73101312221 is a deficient number, since it is larger than the sum of its proper divisors (10443044611).

73101312221 is a wasteful number, since it uses less digits than its factorization.

73101312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10443044610.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 73101312221 its reverse (12221310137), we get a palindrome (85322622358).

The spelling of 73101312221 in words is "seventy-three billion, one hundred one million, three hundred twelve thousand, two hundred twenty-one".