1312231222 has 16 divisors (see below), whose sum is σ = 1977948000. Its totient is φ = 652921920.

The previous prime is 1312231103. The next prime is 1312231253. The reversal of 1312231222 is 2221322131.

It is a super-2 number, since 2×1312231222² = 3443901559983226568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1312231222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785404 + ... + 787072.

It is an arithmetic number, because the mean of its divisors is an integer number (123621750).

Almost surely, 2^1312231222 is an apocalyptic number.

1312231222 is a deficient number, since it is larger than the sum of its proper divisors (665716778).

1312231222 is a wasteful number, since it uses less digits than its factorization.

1312231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351.

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

The square root of 1312231222 is about 36224.7321867257. The cubic root of 1312231222 is about 1094.8050421938.

Adding to 1312231222 its reverse (2221322131), we get a palindrome (3533553353).

Subtracting 1312231222 from its reverse (2221322131), we obtain a palindrome (909090909).

It can be divided in two parts, 13122 and 31222, that added together give a palindrome (44344).

The spelling of 1312231222 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, two hundred twenty-two".