11220011988 has 24 divisors (see below), whose sum is σ = 26183109792. Its totient is φ = 3739563744.

The previous prime is 11220011981. The next prime is 11220012047. The reversal of 11220011988 is 88911002211.

11220011988 is a modest number, since divided by 11988 gives 11220 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220011981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60931 + ... + 161717.

It is an arithmetic number, because the mean of its divisors is an integer number (1090962908).

Almost surely, 2^11220011988 is an apocalyptic number.

It is an amenable number.

11220011988 is an abundant number, since it is smaller than the sum of its proper divisors (14963097804).

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

11220011988 is a wasteful number, since it uses less digits than its factorization.

11220011988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110071 (or 110069 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 11220011988 in words is "eleven billion, two hundred twenty million, eleven thousand, nine hundred eighty-eight".