1312231221233 has 8 divisors (see below), whose sum is σ = 1319645003688. Its totient is φ = 1304825042304.

The previous prime is 1312231221209. The next prime is 1312231221239. The reversal of 1312231221233 is 3321221322131.

It can be written as a sum of positive squares in 4 ways, for example, as 200908339984 + 1111322881249 = 448228^2 + 1054193^2 .

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 1312231221233 - 2³² = 1307936253937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312231221239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554566 + ... + 2245247.

It is an arithmetic number, because the mean of its divisors is an integer number (164955625461).

Almost surely, 2^{1312231221233} is an apocalyptic number.

It is an amenable number.

1312231221233 is a deficient number, since it is larger than the sum of its proper divisors (7413782455).

1312231221233 is a wasteful number, since it uses less digits than its factorization.

1312231221233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801763.

The product of its digits is 2592, while the sum is 26.

Adding to 1312231221233 its reverse (3321221322131), we get a palindrome (4633452543364).

The spelling of 1312231221233 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty-three".