1212313222 has 4 divisors (see below), whose sum is σ = 1818469836. Its totient is φ = 606156610.

The previous prime is 1212313217. The next prime is 1212313229. The reversal of 1212313222 is 2223132121.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1212313222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212313229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303078304 + ... + 303078307.

It is an arithmetic number, because the mean of its divisors is an integer number (454617459).

Almost surely, 2^1212313222 is an apocalyptic number.

1212313222 is a deficient number, since it is larger than the sum of its proper divisors (606156614).

1212313222 is an equidigital number, since it uses as much as digits as its factorization.

1212313222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606156613.

The product of its digits is 288, while the sum is 19.

The square root of 1212313222 is about 34818.2886138880. The cubic root of 1212313222 is about 1066.2808608425.

Adding to 1212313222 its reverse (2223132121), we get a palindrome (3435445343).

The spelling of 1212313222 in words is "one billion, two hundred twelve million, three hundred thirteen thousand, two hundred twenty-two".