11112221000 has 64 divisors (see below), whose sum is σ = 26018928000. Its totient is φ = 4442097600.

The previous prime is 11112220993. The next prime is 11112221039. The reversal of 11112221000 is 12221111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2456741 + ... + 2461259.

It is an arithmetic number, because the mean of its divisors is an integer number (406545750).

Almost surely, 2^11112221000 is an apocalyptic number.

11112221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112221000 is an abundant number, since it is smaller than the sum of its proper divisors (14906707000).

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

11112221000 is a wasteful number, since it uses less digits than its factorization.

11112221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11112221000 its reverse (12221111), we get a palindrome (11124442111).

The spelling of 11112221000 in words is "eleven billion, one hundred twelve million, two hundred twenty-one thousand".