11111212222000 has 160 divisors (see below), whose sum is σ = 29412940737024. Its totient is φ = 4026161376000.

The previous prime is 11111212221937. The next prime is 11111212222001. The reversal of 11111212222000 is 22221211111.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (11111212222001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5333677 + ... + 7118323.

Almost surely, 2^{11111212222000} is an apocalyptic number.

11111212222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111212222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14706470368512).

11111212222000 is an abundant number, since it is smaller than the sum of its proper divisors (18301728515024).

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

11111212222000 is a wasteful number, since it uses less digits than its factorization.

11111212222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784964 (or 1784948 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11111212222000 its reverse (22221211111), we get a palindrome (11133433433111).

The spelling of 11111212222000 in words is "eleven trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand".