111111111001010 has 16 divisors (see below), whose sum is σ = 200122174541016. Its totient is φ = 44417294458368.

The previous prime is 111111111000991. The next prime is 111111111001021. The reversal of 111111111001010 is 10100111111111.

It can be written as a sum of positive squares in 4 ways, for example, as 37591650227209 + 73519460773801 = 6131203^2 + 8574349^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111111111000982 and 111111111001000.

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, 3393725567 + ... + 3393758306.

Almost surely, 2^{111111111001010} is an apocalyptic number.

111111111001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111111001010 is a deficient number, since it is larger than the sum of its proper divisors (89011063540006).

111111111001010 is a wasteful number, since it uses less digits than its factorization.

111111111001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787485517.

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

Adding to 111111111001010 its reverse (10100111111111), we get a palindrome (121211222112121).

The spelling of 111111111001010 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one thousand, ten".