2111331231113 has 4 divisors (see below), whose sum is σ = 2273741325828. Its totient is φ = 1948921136400.

The previous prime is 2111331231109. The next prime is 2111331231131. The reversal of 2111331231113 is 3111321331112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 337221781264 + 1774109449849 = 580708^2 + 1331957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111331231113 - 2² = 2111331231109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111331231143) 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, 81205047338 + ... + 81205047363.

It is an arithmetic number, because the mean of its divisors is an integer number (568435331457).

Almost surely, 2^{2111331231113} is an apocalyptic number.

It is an amenable number.

2111331231113 is a deficient number, since it is larger than the sum of its proper divisors (162410094715).

2111331231113 is a wasteful number, since it uses less digits than its factorization.

2111331231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162410094714.

The product of its digits is 324, while the sum is 23.

Adding to 2111331231113 its reverse (3111321331112), we get a palindrome (5222652562225).

Subtracting 2111331231113 from its reverse (3111321331112), we obtain a palindrome (999990099999).

The spelling of 2111331231113 in words is "two trillion, one hundred eleven billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred thirteen".