11221111200012 has 144 divisors (see below), whose sum is σ = 31323543084288. Its totient is φ = 3115087113600.

The previous prime is 11221111199999. The next prime is 11221111200031. The reversal of 11221111200012 is 21000211112211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11221111199964 and 11221111200000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15461887 + ... + 16171337.

It is an arithmetic number, because the mean of its divisors is an integer number (217524604752).

Almost surely, 2^{11221111200012} is an apocalyptic number.

11221111200012 is a gapful number since it is divisible by the number (12) 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 11221111200012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15661771542144).

11221111200012 is an abundant number, since it is smaller than the sum of its proper divisors (20102431884276).

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

11221111200012 is a wasteful number, since it uses less digits than its factorization.

11221111200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710236 (or 710227 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11221111200012 its reverse (21000211112211), we get a palindrome (32221322312223).

The spelling of 11221111200012 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, two hundred thousand, twelve".