1321120311223 has 4 divisors (see below), whose sum is σ = 1363737095488. Its totient is φ = 1278503526960.

The previous prime is 1321120311193. The next prime is 1321120311227. The reversal of 1321120311223 is 3221130211231.

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 1321120311223 - 2¹³ = 1321120303031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321120311194 and 1321120311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321120311227) 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, 21308392086 + ... + 21308392147.

It is an arithmetic number, because the mean of its divisors is an integer number (340934273872).

Almost surely, 2^{1321120311223} is an apocalyptic number.

1321120311223 is a deficient number, since it is larger than the sum of its proper divisors (42616784265).

1321120311223 is an equidigital number, since it uses as much as digits as its factorization.

1321120311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42616784264.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1321120311223 its reverse (3221130211231), we get a palindrome (4542250522454).

The spelling of 1321120311223 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, three hundred eleven thousand, two hundred twenty-three".