768000011221 has 4 divisors (see below), whose sum is σ = 768001783500. Its totient is φ = 767998238944.

The previous prime is 768000011213. The next prime is 768000011239. The reversal of 768000011221 is 122110000867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122110000867 = 103 ⋅1185533989.

It can be written as a sum of positive squares in 2 ways, for example, as 414754032196 + 353245979025 = 644014^2 + 594345^2 .

It is a cyclic number.

It is not a de Polignac number, because 768000011221 - 2³ = 768000011213 is a prime.

It is a super-2 number, since 2×768000011221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 768000011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768000911221) 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, 246105 + ... + 1263553.

It is an arithmetic number, because the mean of its divisors is an integer number (192000445875).

Almost surely, 2^768000011221 is an apocalyptic number.

It is an amenable number.

768000011221 is a deficient number, since it is larger than the sum of its proper divisors (1772279).

768000011221 is a wasteful number, since it uses less digits than its factorization.

768000011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772278.

The product of its (nonzero) digits is 1344, while the sum is 28.

The spelling of 768000011221 in words is "seven hundred sixty-eight billion, eleven thousand, two hundred twenty-one".