1231211231113 has 8 divisors (see below), whose sum is σ = 1231599657600. Its totient is φ = 1230822875568.

The previous prime is 1231211231069. The next prime is 1231211231183. The reversal of 1231211231113 is 3111321121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231211231113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231211231183) 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, 76612243 + ... + 76628311.

It is an arithmetic number, because the mean of its divisors is an integer number (153949957200).

Almost surely, 2^{1231211231113} is an apocalyptic number.

It is an amenable number.

1231211231113 is a deficient number, since it is larger than the sum of its proper divisors (388426487).

1231211231113 is a wasteful number, since it uses less digits than its factorization.

1231211231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35471.

The product of its digits is 216, while the sum is 22.

Adding to 1231211231113 its reverse (3111321121321), we get a palindrome (4342532352434).

The spelling of 1231211231113 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirty-one thousand, one hundred thirteen".