1211131221333 has 16 divisors (see below), whose sum is σ = 1761691493376. Its totient is φ = 733999721840.

The previous prime is 1211131221319. The next prime is 1211131221343. The reversal of 1211131221333 is 3331221311121.

It is not a de Polignac number, because 1211131221333 - 2⁹ = 1211131220821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211131221343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 856210 + ... + 1776332.

It is an arithmetic number, because the mean of its divisors is an integer number (110105718336).

Almost surely, 2^{1211131221333} is an apocalyptic number.

It is an amenable number.

1211131221333 is a deficient number, since it is larger than the sum of its proper divisors (550560272043).

1211131221333 is a wasteful number, since it uses less digits than its factorization.

1211131221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960024.

The product of its digits is 648, while the sum is 24.

Adding to 1211131221333 its reverse (3331221311121), we get a palindrome (4542352532454).

The spelling of 1211131221333 in words is "one trillion, two hundred eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-three".