12221111011100 has 72 divisors (see below), whose sum is σ = 26899085410848. Its totient is φ = 4818561529600.

The previous prime is 12221111011063. The next prime is 12221111011121. The reversal of 12221111011100 is 111011112221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33422462 + ... + 33786138.

It is an arithmetic number, because the mean of its divisors is an integer number (373598408484).

Almost surely, 2^{12221111011100} is an apocalyptic number.

12221111011100 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 12221111011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13449542705424).

12221111011100 is an abundant number, since it is smaller than the sum of its proper divisors (14677974399748).

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

12221111011100 is a wasteful number, since it uses less digits than its factorization.

12221111011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368495 (or 368488 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12221111011100 its reverse (111011112221), we get a palindrome (12332122123321).

The spelling of 12221111011100 in words is "twelve trillion, two hundred twenty-one billion, one hundred eleven million, eleven thousand, one hundred".