11121031013 has 2 divisors, whose sum is σ = 11121031014. Its totient is φ = 11121031012.

The previous prime is 11121030989. The next prime is 11121031073. The reversal of 11121031013 is 31013012111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9936501124 + 1184529889 = 99682^2 + 34417^2 .

It is an emirp because it is prime and its reverse (31013012111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11121031013 - 2¹⁶ = 11120965477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121031073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560515506 + 5560515507.

It is an arithmetic number, because the mean of its divisors is an integer number (5560515507).

Almost surely, 2^11121031013 is an apocalyptic number.

It is an amenable number.

11121031013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121031013 is an equidigital number, since it uses as much as digits as its factorization.

11121031013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11121031013 its reverse (31013012111), we get a palindrome (42134043124).

The spelling of 11121031013 in words is "eleven billion, one hundred twenty-one million, thirty-one thousand, thirteen".