11111122000 has 80 divisors (see below), whose sum is σ = 29309177664. Its totient is φ = 4040400000.

The previous prime is 11111121977. The next prime is 11111122007. The reversal of 11111122000 is 22111111.

It is a tau number, because it is divible by the number of its divisors (80).

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 (11111122007) 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, 230526 + ... + 274525.

Almost surely, 2^11111122000 is an apocalyptic number.

11111122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111122000 is an abundant number, since it is smaller than the sum of its proper divisors (18198055664).

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

11111122000 is a wasteful number, since it uses less digits than its factorization.

11111122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505085 (or 505069 counting only the distinct ones).

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

Adding to 11111122000 its reverse (22111111), we get a palindrome (11133233111).

It can be divided in two parts, 111 and 11122000, that added together give a palindrome (11122111).

The spelling of 11111122000 in words is "eleven billion, one hundred eleven million, one hundred twenty-two thousand".