11331221113131 has 16 divisors (see below), whose sum is σ = 15156851185056. Its totient is φ = 7529870140416.

The previous prime is 11331221113111. The next prime is 11331221113133. The reversal of 11331221113131 is 13131112213311.

It is not a de Polignac number, because 11331221113131 - 2¹⁸ = 11331220850987 is a prime.

It is a super-2 number, since 2×11331221113131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11331221113133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77669751 + ... + 77815503.

It is an arithmetic number, because the mean of its divisors is an integer number (947303199066).

Almost surely, 2^{11331221113131} is an apocalyptic number.

11331221113131 is a deficient number, since it is larger than the sum of its proper divisors (3825630071925).

11331221113131 is a wasteful number, since it uses less digits than its factorization.

11331221113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228862.

The product of its digits is 324, while the sum is 24.

Adding to 11331221113131 its reverse (13131112213311), we get a palindrome (24462333326442).

The spelling of 11331221113131 in words is "eleven trillion, three hundred thirty-one billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred thirty-one".