111111111111010 has 16 divisors (see below), whose sum is σ = 201438848923200. Its totient is φ = 44124700239216.

The previous prime is 111111111111001. The next prime is 111111111111023. The reversal of 111111111111010 is 10111111111111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39968024190 + ... + 39968026969.

It is an arithmetic number, because the mean of its divisors is an integer number (12589928057700).

Almost surely, 2^{111111111111010} is an apocalyptic number.

111111111111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111111111010 is a deficient number, since it is larger than the sum of its proper divisors (90327737812190).

111111111111010 is a wasteful number, since it uses less digits than its factorization.

111111111111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79936051305.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 111111111111010 its reverse (10111111111111), we get a palindrome (121222222222121).

The spelling of 111111111111010 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, ten".