111601509403 has 2 divisors, whose sum is σ = 111601509404. Its totient is φ = 111601509402.

The previous prime is 111601509391. The next prime is 111601509449. The reversal of 111601509403 is 304905106111.

It is a weak prime.

It is an emirp because it is prime and its reverse (304905106111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111601509403 - 2¹³ = 111601501211 is a prime.

It is not a weakly prime, because it can be changed into another prime (111601509493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55800754701 + 55800754702.

It is an arithmetic number, because the mean of its divisors is an integer number (55800754702).

Almost surely, 2^111601509403 is an apocalyptic number.

111601509403 is a deficient number, since it is larger than the sum of its proper divisors (1).

111601509403 is an equidigital number, since it uses as much as digits as its factorization.

111601509403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 111601509403 in words is "one hundred eleven billion, six hundred one million, five hundred nine thousand, four hundred three".