1311233020111 has 16 divisors (see below), whose sum is σ = 1499974963200. Its totient is φ = 1122847205760.

The previous prime is 1311233020099. The next prime is 1311233020127. The reversal of 1311233020111 is 1110203321131.

It is not a de Polignac number, because 1311233020111 - 2¹¹ = 1311233018063 is a prime.

It is a super-3 number, since 3×1311233020111³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311233020171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49803831 + ... + 49830151.

It is an arithmetic number, because the mean of its divisors is an integer number (93748435200).

Almost surely, 2^{1311233020111} is an apocalyptic number.

1311233020111 is a deficient number, since it is larger than the sum of its proper divisors (188741943089).

1311233020111 is a wasteful number, since it uses less digits than its factorization.

1311233020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32814.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311233020111 its reverse (1110203321131), we get a palindrome (2421436341242).

The spelling of 1311233020111 in words is "one trillion, three hundred eleven billion, two hundred thirty-three million, twenty thousand, one hundred eleven".