1312221102223 has 4 divisors (see below), whose sum is σ = 1369274193648. Its totient is φ = 1255168010800.

The previous prime is 1312221102209. The next prime is 1312221102239. The reversal of 1312221102223 is 3222011222131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312221102223 - 2¹⁷ = 1312220971151 is a prime.

It is a super-2 number, since 2×1312221102223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312221102194 and 1312221102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221102253) 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 3 ways as a sum of consecutive naturals, for example, 28526545678 + ... + 28526545723.

It is an arithmetic number, because the mean of its divisors is an integer number (342318548412).

Almost surely, 2^{1312221102223} is an apocalyptic number.

1312221102223 is a deficient number, since it is larger than the sum of its proper divisors (57053091425).

1312221102223 is an equidigital number, since it uses as much as digits as its factorization.

1312221102223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57053091424.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1312221102223 its reverse (3222011222131), we get a palindrome (4534232324354).

The spelling of 1312221102223 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-three".