11331211323131 has 4 divisors (see below), whose sum is σ = 12949955797872. Its totient is φ = 9712466848392.

The previous prime is 11331211323097. The next prime is 11331211323253. The reversal of 11331211323131 is 13132311213311.

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

It is not a de Polignac number, because 11331211323131 - 2¹⁰ = 11331211322107 is a prime.

It is a super-2 number, since 2×11331211323131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11331211323131.

It is not an unprimeable number, because it can be changed into a prime (11331211322131) 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 3 ways as a sum of consecutive naturals, for example, 809372237360 + ... + 809372237373.

It is an arithmetic number, because the mean of its divisors is an integer number (3237488949468).

Almost surely, 2^{11331211323131} is an apocalyptic number.

11331211323131 is a deficient number, since it is larger than the sum of its proper divisors (1618744474741).

11331211323131 is an equidigital number, since it uses as much as digits as its factorization.

11331211323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618744474740.

The product of its digits is 972, while the sum is 26.

Adding to 11331211323131 its reverse (13132311213311), we get a palindrome (24463522536442).

The spelling of 11331211323131 in words is "eleven trillion, three hundred thirty-one billion, two hundred eleven million, three hundred twenty-three thousand, one hundred thirty-one".