1311122011223 has 8 divisors (see below), whose sum is σ = 1313400582048. Its totient is φ = 1308844422144.

The previous prime is 1311122011207. The next prime is 1311122011279. The reversal of 1311122011223 is 3221102211131.

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 1311122011223 - 2⁴ = 1311122011207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311122011195 and 1311122011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311122031223) 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, 2453615 + ... + 2939807.

It is an arithmetic number, because the mean of its divisors is an integer number (164175072756).

Almost surely, 2^{1311122011223} is an apocalyptic number.

1311122011223 is a deficient number, since it is larger than the sum of its proper divisors (2278570825).

1311122011223 is an equidigital number, since it uses as much as digits as its factorization.

1311122011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490873.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1311122011223 its reverse (3221102211131), we get a palindrome (4532224222354).

The spelling of 1311122011223 in words is "one trillion, three hundred eleven billion, one hundred twenty-two million, eleven thousand, two hundred twenty-three".