111111110101010 has 32 divisors (see below), whose sum is σ = 207367840627200. Its totient is φ = 42814127805120.

The previous prime is 111111110100997. The next prime is 111111110101073. The reversal of 111111110101010 is 10101011111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111110100982 and 111111110101000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436252826 + ... + 436507445.

It is an arithmetic number, because the mean of its divisors is an integer number (6480245019600).

Almost surely, 2^{111111110101010} is an apocalyptic number.

111111110101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111110101010 is a deficient number, since it is larger than the sum of its proper divisors (96256730526190).

111111110101010 is a wasteful number, since it uses less digits than its factorization.

111111110101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872760746.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 111111110101010 its reverse (10101011111111), we get a palindrome (121212121212121).

The spelling of 111111110101010 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, one hundred one thousand, ten".