11121817772 has 24 divisors (see below), whose sum is σ = 21081524016. Its totient is φ = 5103471168.

The previous prime is 11121817771. The next prime is 11121817799. The reversal of 11121817772 is 27771812111.

It is not an unprimeable number, because it can be changed into a prime (11121817771) 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, 609158 + ... + 627149.

It is an arithmetic number, because the mean of its divisors is an integer number (878396834).

Almost surely, 2^11121817772 is an apocalyptic number.

It is an amenable number.

11121817772 is a deficient number, since it is larger than the sum of its proper divisors (9959706244).

11121817772 is a wasteful number, since it uses less digits than its factorization.

11121817772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236497 (or 1236495 counting only the distinct ones).

The product of its digits is 10976, while the sum is 38.

The spelling of 11121817772 in words is "eleven billion, one hundred twenty-one million, eight hundred seventeen thousand, seven hundred seventy-two".