11112221010000 has 400 divisors, whose sum is σ = 39179146659840. Its totient is φ = 2690681280000.

The previous prime is 11112221009927. The next prime is 11112221010061. The reversal of 11112221010000 is 1012221111.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 284770491 + ... + 284809509.

Almost surely, 2^{11112221010000} is an apocalyptic number.

11112221010000 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 11112221010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19589573329920).

11112221010000 is an abundant number, since it is smaller than the sum of its proper divisors (28066925649840).

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

11112221010000 is a wasteful number, since it uses less digits than its factorization.

11112221010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39924 (or 39903 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11112221010000 its reverse (1012221111), we get a palindrome (11113233231111).

The spelling of 11112221010000 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, ten thousand".