111220935613 has 2 divisors, whose sum is σ = 111220935614. Its totient is φ = 111220935612.

The previous prime is 111220935601. The next prime is 111220935649. The reversal of 111220935613 is 316539022111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110797111044 + 423824569 = 332862^2 + 20587^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220935613 - 2¹³ = 111220927421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220935013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610467806 + 55610467807.

It is an arithmetic number, because the mean of its divisors is an integer number (55610467807).

Almost surely, 2^111220935613 is an apocalyptic number.

It is an amenable number.

111220935613 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220935613 is an equidigital number, since it uses as much as digits as its factorization.

111220935613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

Adding to 111220935613 its reverse (316539022111), we get a palindrome (427759957724).

The spelling of 111220935613 in words is "one hundred eleven billion, two hundred twenty million, nine hundred thirty-five thousand, six hundred thirteen".