11212100000 has 72 divisors (see below), whose sum is σ = 27590757516. Its totient is φ = 4484800000.

The previous prime is 11212099979. The next prime is 11212100023. The reversal of 11212100000 is 121211.

It can be written as a sum of positive squares in 6 ways, for example, as 4039365136 + 7172734864 = 63556^2 + 84692^2 .

It is a super-2 number, since 2×11212100000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43940 + ... + 156060.

Almost surely, 2^11212100000 is an apocalyptic number.

11212100000 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 11212100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13795378758).

11212100000 is an abundant number, since it is smaller than the sum of its proper divisors (16378657516).

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

11212100000 is an frugal number, since it uses more digits than its factorization.

11212100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112156 (or 112128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11212100000 its reverse (121211), we get a palindrome (11212221211).

The spelling of 11212100000 in words is "eleven billion, two hundred twelve million, one hundred thousand".