11101220001000 has 1536 divisors, whose sum is σ = 41308276838400. Its totient is φ = 2682408960000.

The previous prime is 11101220000953. The next prime is 11101220001049. The reversal of 11101220001000 is 10002210111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 39506120860 + ... + 39506121140.

It is an arithmetic number, because the mean of its divisors is an integer number (26893409400).

Almost surely, 2^{11101220001000} is an apocalyptic number.

11101220001000 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 11101220001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20654138419200).

11101220001000 is an abundant number, since it is smaller than the sum of its proper divisors (30207056837400).

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

11101220001000 is a wasteful number, since it uses less digits than its factorization.

11101220001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11101220001000 its reverse (10002210111), we get a palindrome (11111222211111).

The spelling of 11101220001000 in words is "eleven trillion, one hundred one billion, two hundred twenty million, one thousand".