1222213277 has 4 divisors (see below), whose sum is σ = 1223073600. Its totient is φ = 1221352956.

The previous prime is 1222213243. The next prime is 1222213297. The reversal of 1222213277 is 7723122221.

It is a happy number.

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 1222213277 - 2¹⁴ = 1222196893 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 (1222213297) 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, 428027 + ... + 430872.

It is an arithmetic number, because the mean of its divisors is an integer number (305768400).

Almost surely, 2^1222213277 is an apocalyptic number.

It is an amenable number.

1222213277 is a deficient number, since it is larger than the sum of its proper divisors (860323).

1222213277 is an equidigital number, since it uses as much as digits as its factorization.

1222213277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860322.

The product of its digits is 4704, while the sum is 29.

The square root of 1222213277 is about 34960.1670047498. The cubic root of 1222213277 is about 1069.1755016188.

Adding to 1222213277 its reverse (7723122221), we get a palindrome (8945335498).

The spelling of 1222213277 in words is "one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred seventy-seven".