1311203332111 has 4 divisors (see below), whose sum is σ = 1353500213824. Its totient is φ = 1268906450400.

The previous prime is 1311203332097. The next prime is 1311203332199. The reversal of 1311203332111 is 1112333021131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311203332111 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 (1311203332211) 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, 21148440810 + ... + 21148440871.

It is an arithmetic number, because the mean of its divisors is an integer number (338375053456).

Almost surely, 2^{1311203332111} is an apocalyptic number.

1311203332111 is a deficient number, since it is larger than the sum of its proper divisors (42296881713).

1311203332111 is an equidigital number, since it uses as much as digits as its factorization.

1311203332111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42296881712.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1311203332111 its reverse (1112333021131), we get a palindrome (2423536353242).

The spelling of 1311203332111 in words is "one trillion, three hundred eleven billion, two hundred three million, three hundred thirty-two thousand, one hundred eleven".