1331111121013 has 4 divisors (see below), whose sum is σ = 1331587030540. Its totient is φ = 1330635211488.

The previous prime is 1331111121001. The next prime is 1331111121017. The reversal of 1331111121013 is 3101211111331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1129835065969 + 201276055044 = 1062937^2 + 448638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331111121013 is a prime.

It is a super-3 number, since 3×1331111121013³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331111121017) 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, 237950568 + ... + 237956161.

It is an arithmetic number, because the mean of its divisors is an integer number (332896757635).

Almost surely, 2^{1331111121013} is an apocalyptic number.

It is an amenable number.

1331111121013 is a deficient number, since it is larger than the sum of its proper divisors (475909527).

1331111121013 is an equidigital number, since it uses as much as digits as its factorization.

1331111121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475909526.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 1331111121013 its reverse (3101211111331), we get a palindrome (4432322232344).

The spelling of 1331111121013 in words is "one trillion, three hundred thirty-one billion, one hundred eleven million, one hundred twenty-one thousand, thirteen".