1131313433221 has 16 divisors (see below), whose sum is σ = 1200275556480. Its totient is φ = 1062621457920.

The previous prime is 1131313433219. The next prime is 1131313433231. The reversal of 1131313433221 is 1223343131311.

It is a cyclic number.

It is not a de Polignac number, because 1131313433221 - 2¹ = 1131313433219 is a prime.

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 1131313433221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131313433231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19857186 + ... + 19914076.

It is an arithmetic number, because the mean of its divisors is an integer number (75017222280).

Almost surely, 2^{1131313433221} is an apocalyptic number.

It is an amenable number.

1131313433221 is a deficient number, since it is larger than the sum of its proper divisors (68962123259).

1131313433221 is a wasteful number, since it uses less digits than its factorization.

1131313433221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59244.

The product of its digits is 3888, while the sum is 28.

Adding to 1131313433221 its reverse (1223343131311), we get a palindrome (2354656564532).

The spelling of 1131313433221 in words is "one trillion, one hundred thirty-one billion, three hundred thirteen million, four hundred thirty-three thousand, two hundred twenty-one".