111111001001010 has 48 divisors (see below), whose sum is σ = 290184067240704. Its totient is φ = 29496732098976.

The previous prime is 111111001000991. The next prime is 111111001001017. The reversal of 111111001001010 is 10100100111111.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111111001000983 and 111111001001001.

It is not an unprimeable number, because it can be changed into a prime (111111001001017) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 2768066652 + ... + 2768106791.

It is an arithmetic number, because the mean of its divisors is an integer number (6045501400848).

Almost surely, 2^{111111001001010} is an apocalyptic number.

111111001001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111001001010 is an abundant number, since it is smaller than the sum of its proper divisors (179073066239694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111001001010 is a wasteful number, since it uses less digits than its factorization.

111111001001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536173679 (or 5536173676 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111111001001010 its reverse (10100100111111), we get a palindrome (121211101112121).

The spelling of 111111001001010 in words is "one hundred eleven trillion, one hundred eleven billion, one million, one thousand, ten".