11311220000 has 120 divisors (see below), whose sum is σ = 28183478400. Its totient is φ = 4466592000.

The previous prime is 11311219991. The next prime is 11311220033. The reversal of 11311220000 is 2211311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1576421 + ... + 1583579.

It is an arithmetic number, because the mean of its divisors is an integer number (234862320).

Almost surely, 2^11311220000 is an apocalyptic number.

11311220000 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 11311220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14091739200).

11311220000 is an abundant number, since it is smaller than the sum of its proper divisors (16872258400).

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

11311220000 is an frugal number, since it uses more digits than its factorization.

11311220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7268 (or 7245 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11311220000 its reverse (2211311), we get a palindrome (11313431311).

The spelling of 11311220000 in words is "eleven billion, three hundred eleven million, two hundred twenty thousand".