11011111000988 has 48 divisors (see below), whose sum is σ = 22093539277824. Its totient is φ = 4703785369920.

The previous prime is 11011111000987. The next prime is 11011111001053. The reversal of 11011111000988 is 88900011111011.

It is a super-2 number, since 2×11011111000988² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111000987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12772931 + ... + 13607717.

It is an arithmetic number, because the mean of its divisors is an integer number (460282068288).

Almost surely, 2^{11011111000988} is an apocalyptic number.

It is an amenable number.

11011111000988 is an abundant number, since it is smaller than the sum of its proper divisors (11082428276836).

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

11011111000988 is a wasteful number, since it uses less digits than its factorization.

11011111000988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836322 (or 836320 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 32.

Adding to 11011111000988 its reverse (88900011111011), we get a palindrome (99911122111999).

The spelling of 11011111000988 in words is "eleven trillion, eleven billion, one hundred eleven million, nine hundred eighty-eight", and thus it is an aban number.