1131212211213 has 16 divisors (see below), whose sum is σ = 1723883356160. Its totient is φ = 646357697136.

The previous prime is 1131212211211. The next prime is 1131212211253. The reversal of 1131212211213 is 3121122121311.

It is not a de Polignac number, because 1131212211213 - 2¹ = 1131212211211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1131212211213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131212211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1770445 + ... + 2323122.

It is an arithmetic number, because the mean of its divisors is an integer number (107742709760).

Almost surely, 2^{1131212211213} is an apocalyptic number.

It is an amenable number.

1131212211213 is a deficient number, since it is larger than the sum of its proper divisors (592671144947).

1131212211213 is a wasteful number, since it uses less digits than its factorization.

1131212211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106736.

The product of its digits is 144, while the sum is 21.

Adding to 1131212211213 its reverse (3121122121311), we get a palindrome (4252334332524).

The spelling of 1131212211213 in words is "one trillion, one hundred thirty-one billion, two hundred twelve million, two hundred eleven thousand, two hundred thirteen".