1311423023111 has 4 divisors (see below), whose sum is σ = 1339325640672. Its totient is φ = 1283520405552.

The previous prime is 1311423023089. The next prime is 1311423023123. The reversal of 1311423023111 is 1113203241131.

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 1311423023111 - 2⁶ = 1311423023047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311423023161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13951308710 + ... + 13951308803.

It is an arithmetic number, because the mean of its divisors is an integer number (334831410168).

Almost surely, 2^{1311423023111} is an apocalyptic number.

1311423023111 is a deficient number, since it is larger than the sum of its proper divisors (27902617561).

1311423023111 is an equidigital number, since it uses as much as digits as its factorization.

1311423023111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27902617560.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1311423023111 its reverse (1113203241131), we get a palindrome (2424626264242).

The spelling of 1311423023111 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, twenty-three thousand, one hundred eleven".