12222777 has 8 divisors (see below), whose sum is σ = 18625216. Its totient is φ = 6984432.

The previous prime is 12222767. The next prime is 12222781. The reversal of 12222777 is 77722221.

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

It is not a de Polignac number, because 12222777 - 2⁴ = 12222761 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12222767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290998 + ... + 291039.

It is an arithmetic number, because the mean of its divisors is an integer number (2328152).

Almost surely, 2^12222777 is an apocalyptic number.

It is an amenable number.

12222777 is a deficient number, since it is larger than the sum of its proper divisors (6402439).

12222777 is an equidigital number, since it uses as much as digits as its factorization.

12222777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582047.

The product of its digits is 5488, while the sum is 30.

The square root of 12222777 is about 3496.1088369786. The cubic root of 12222777 is about 230.3509261742.

Adding to 12222777 its reverse (77722221), we get a palindrome (89944998).

The spelling of 12222777 in words is "twelve million, two hundred twenty-two thousand, seven hundred seventy-seven".