11111000012 has 24 divisors (see below), whose sum is σ = 23529177504. Its totient is φ = 4481747712.

The previous prime is 11111000009. The next prime is 11111000023. The reversal of 11111000012 is 21000011111.

It is a happy number.

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, 11670743 + ... + 11671694.

It is an arithmetic number, because the mean of its divisors is an integer number (980382396).

Almost surely, 2^11111000012 is an apocalyptic number.

It is an amenable number.

11111000012 is an abundant number, since it is smaller than the sum of its proper divisors (12418177492).

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

11111000012 is a wasteful number, since it uses less digits than its factorization.

11111000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23342465 (or 23342463 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11111000012 its reverse (21000011111), we get a palindrome (32111011123).

The spelling of 11111000012 in words is "eleven billion, one hundred eleven million, twelve", and thus it is an aban number.