111109019902 has 4 divisors (see below), whose sum is σ = 166663529856. Its totient is φ = 55554509950.

The previous prime is 111109019887. The next prime is 111109019911. The reversal of 111109019902 is 209910901111.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777254974 + ... + 27777254977.

It is an arithmetic number, because the mean of its divisors is an integer number (41665882464).

Almost surely, 2^111109019902 is an apocalyptic number.

111109019902 is a deficient number, since it is larger than the sum of its proper divisors (55554509954).

111109019902 is an equidigital number, since it uses as much as digits as its factorization.

111109019902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55554509953.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 111109019902 in words is "one hundred eleven billion, one hundred nine million, nineteen thousand, nine hundred two".