1311121011133 has 8 divisors (see below), whose sum is σ = 1380176093600. Its totient is φ = 1242070800048.

The previous prime is 1311121011113. The next prime is 1311121011139. The reversal of 1311121011133 is 3311101211131.

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 1311121011133 - 2¹³ = 1311121002941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311121011133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311121011139) 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, 658791 + ... + 1748212.

It is an arithmetic number, because the mean of its divisors is an integer number (172522011700).

Almost surely, 2^{1311121011133} is an apocalyptic number.

It is an amenable number.

1311121011133 is a deficient number, since it is larger than the sum of its proper divisors (69055082467).

1311121011133 is a wasteful number, since it uses less digits than its factorization.

1311121011133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435691.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 1311121011133 its reverse (3311101211131), we get a palindrome (4622222222264).

The spelling of 1311121011133 in words is "one trillion, three hundred eleven billion, one hundred twenty-one million, eleven thousand, one hundred thirty-three".