14777319221 has 4 divisors (see below), whose sum is σ = 16888364832. Its totient is φ = 12666273612.

The previous prime is 14777319187. The next prime is 14777319223. The reversal of 14777319221 is 12291377741.

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 a de Polignac number, because none of the positive numbers 2^k-14777319221 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 (14777319223) 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, 1055522795 + ... + 1055522808.

It is an arithmetic number, because the mean of its divisors is an integer number (4222091208).

Almost surely, 2^14777319221 is an apocalyptic number.

It is an amenable number.

14777319221 is a deficient number, since it is larger than the sum of its proper divisors (2111045611).

14777319221 is an equidigital number, since it uses as much as digits as its factorization.

14777319221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111045610.

The product of its digits is 148176, while the sum is 44.

The spelling of 14777319221 in words is "fourteen billion, seven hundred seventy-seven million, three hundred nineteen thousand, two hundred twenty-one".