1312222231 has 8 divisors (see below), whose sum is σ = 1408446144. Its totient is φ = 1218113280.

The previous prime is 1312222217. The next prime is 1312222237. The reversal of 1312222231 is 1322222131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312222231 - 2¹⁷ = 1312091159 is a prime.

It is a super-2 number, since 2×1312222231² = 3443854367061234722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312222199 and 1312222208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312222237) by changing a digit.

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, 527455 + ... + 529936.

It is an arithmetic number, because the mean of its divisors is an integer number (176055768).

Almost surely, 2^1312222231 is an apocalyptic number.

1312222231 is a deficient number, since it is larger than the sum of its proper divisors (96223913).

1312222231 is a wasteful number, since it uses less digits than its factorization.

1312222231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057481.

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

The square root of 1312222231 is about 36224.6080862168. The cubic root of 1312222231 is about 1094.8025417670.

Adding to 1312222231 its reverse (1322222131), we get a palindrome (2634444362).

It can be divided in two parts, 13122 and 22231, that added together give a palindrome (35353).

The spelling of 1312222231 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, two hundred thirty-one".