11221112001000 has 512 divisors, whose sum is σ = 39387443097600. Its totient is φ = 2636466560000.

The previous prime is 11221112000953. The next prime is 11221112001061. The reversal of 11221112001000 is 10021112211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 138196414 + ... + 138277586.

It is an arithmetic number, because the mean of its divisors is an integer number (76928599800).

Almost surely, 2^{11221112001000} is an apocalyptic number.

11221112001000 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 11221112001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19693721548800).

11221112001000 is an abundant number, since it is smaller than the sum of its proper divisors (28166331096600).

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

11221112001000 is a wasteful number, since it uses less digits than its factorization.

11221112001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81338 (or 81324 counting only the distinct ones).

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

Adding to 11221112001000 its reverse (10021112211), we get a palindrome (11231133113211).

The spelling of 11221112001000 in words is "eleven trillion, two hundred twenty-one billion, one hundred twelve million, one thousand".