11221111000 has 64 divisors (see below), whose sum is σ = 28644464160. Its totient is φ = 4080400000.

The previous prime is 11221110997. The next prime is 11221111003. The reversal of 11221111000 is 11112211.

It is an interprime number because it is at equal distance from previous prime (11221110997) and next prime (11221111003).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221111003) 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, 499051 + ... + 521050.

Almost surely, 2^11221111000 is an apocalyptic number.

11221111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221111000 is an abundant number, since it is smaller than the sum of its proper divisors (17423353160).

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

11221111000 is a wasteful number, since it uses less digits than its factorization.

11221111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020133 (or 1020119 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11221111000 its reverse (11112211), we get a palindrome (11232223211).

It can be divided in two parts, 11221 and 111000, that added together give a palindrome (122221).

The spelling of 11221111000 in words is "eleven billion, two hundred twenty-one million, one hundred eleven thousand".