111320121013 has 2 divisors, whose sum is σ = 111320121014. Its totient is φ = 111320121012.

The previous prime is 111320121001. The next prime is 111320121047. The reversal of 111320121013 is 310121023111.

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., 108252844324 + 3067276689 = 329018^2 + 55383^2 .

It is a cyclic number.

It is not a de Polignac number, because 111320121013 - 2⁹ = 111320120501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111320191013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660060506 + 55660060507.

It is an arithmetic number, because the mean of its divisors is an integer number (55660060507).

Almost surely, 2^111320121013 is an apocalyptic number.

It is an amenable number.

111320121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

111320121013 is an equidigital number, since it uses as much as digits as its factorization.

111320121013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111320121013 its reverse (310121023111), we get a palindrome (421441144124).

The spelling of 111320121013 in words is "one hundred eleven billion, three hundred twenty million, one hundred twenty-one thousand, thirteen".