77072000312221 has 8 divisors (see below), whose sum is σ = 77164692212160. Its totient is φ = 76979310390528.

The previous prime is 77072000312189. The next prime is 77072000312239. The reversal of 77072000312221 is 12221300027077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77072000312221 - 2⁵ = 77072000312189 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 (77072090312221) 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 7 ways as a sum of consecutive naturals, for example, 86702205 + ... + 87586621.

It is an arithmetic number, because the mean of its divisors is an integer number (9645586526520).

Almost surely, 2^{77072000312221} is an apocalyptic number.

It is an amenable number.

77072000312221 is a deficient number, since it is larger than the sum of its proper divisors (92691899939).

77072000312221 is a wasteful number, since it uses less digits than its factorization.

77072000312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989123.

The product of its (nonzero) digits is 16464, while the sum is 34.

Adding to 77072000312221 its reverse (12221300027077), we get a palindrome (89293300339298).

The spelling of 77072000312221 in words is "seventy-seven trillion, seventy-two billion, three hundred twelve thousand, two hundred twenty-one".