11121000000 has 392 divisors, whose sum is σ = 40242609888. Its totient is φ = 2688000000.

The previous prime is 11120999999. The next prime is 11121000049. The reversal of 11121000000 is 12111.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 32999832 + ... + 33000168.

Almost surely, 2^11121000000 is an apocalyptic number.

11121000000 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 11121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20121304944).

11121000000 is an abundant number, since it is smaller than the sum of its proper divisors (29121609888).

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

11121000000 is an frugal number, since it uses more digits than its factorization.

11121000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 11121000000 its reverse (12111), we get a palindrome (11121012111).

It can be divided in two parts, 11 and 121000000, that multiplied together give a cube (1331000000 = 1100³).

The spelling of 11121000000 in words is "eleven billion, one hundred twenty-one million", and thus it is an aban number.