1312221013333 has 4 divisors (see below), whose sum is σ = 1312813975788. Its totient is φ = 1311628050880.

The previous prime is 1312221013319. The next prime is 1312221013357. The reversal of 1312221013333 is 3333101222131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1216472231844 + 95748781489 = 1102938^2 + 309433^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312221013333 - 2¹⁷ = 1312220882261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312221013298 and 1312221013307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221010333) 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, 296477908 + ... + 296482333.

It is an arithmetic number, because the mean of its divisors is an integer number (328203493947).

Almost surely, 2^{1312221013333} is an apocalyptic number.

It is an amenable number.

1312221013333 is a deficient number, since it is larger than the sum of its proper divisors (592962455).

1312221013333 is an equidigital number, since it uses as much as digits as its factorization.

1312221013333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592962454.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1312221013333 its reverse (3333101222131), we get a palindrome (4645322235464).

The spelling of 1312221013333 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, thirteen thousand, three hundred thirty-three".