111002019509 has 2 divisors, whose sum is σ = 111002019510. Its totient is φ = 111002019508.

The previous prime is 111002019481. The next prime is 111002019511. The reversal of 111002019509 is 905910200111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108155476900 + 2846542609 = 328870^2 + 53353^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002019509 - 2¹² = 111002015413 is a prime.

Together with 111002019511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111002019529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501009754 + 55501009755.

It is an arithmetic number, because the mean of its divisors is an integer number (55501009755).

Almost surely, 2^111002019509 is an apocalyptic number.

It is an amenable number.

111002019509 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002019509 is an equidigital number, since it uses as much as digits as its factorization.

111002019509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 29.

The spelling of 111002019509 in words is "one hundred eleven billion, two million, nineteen thousand, five hundred nine".