111432421013 has 2 divisors, whose sum is σ = 111432421014. Its totient is φ = 111432421012.

The previous prime is 111432420989. The next prime is 111432421019. The reversal of 111432421013 is 310124234111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72458949124 + 38973471889 = 269182^2 + 197417^2 .

It is a cyclic number.

It is not a de Polignac number, because 111432421013 - 2²⁴ = 111415643797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111432421013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111432421019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55716210506 + 55716210507.

It is an arithmetic number, because the mean of its divisors is an integer number (55716210507).

Almost surely, 2^111432421013 is an apocalyptic number.

It is an amenable number.

111432421013 is a deficient number, since it is larger than the sum of its proper divisors (1).

111432421013 is an equidigital number, since it uses as much as digits as its factorization.

111432421013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 111432421013 its reverse (310124234111), we get a palindrome (421556655124).

The spelling of 111432421013 in words is "one hundred eleven billion, four hundred thirty-two million, four hundred twenty-one thousand, thirteen".