12211100121100 has 36 divisors (see below), whose sum is σ = 26498517656464. Its totient is φ = 4884360713280.

The previous prime is 12211100121067. The next prime is 12211100121109. The reversal of 12211100121100 is 112100111221.

It is a happy number.

It is a super-2 number, since 2×12211100121100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211100121109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5400814 + ... + 7320586.

Almost surely, 2^{12211100121100} is an apocalyptic number.

12211100121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211100121100 is an abundant number, since it is smaller than the sum of its proper divisors (14287417535364).

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

12211100121100 is a wasteful number, since it uses less digits than its factorization.

12211100121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983394 (or 1983387 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12211100121100 its reverse (112100111221), we get a palindrome (12323200232321).

The spelling of 12211100121100 in words is "twelve trillion, two hundred eleven billion, one hundred million, one hundred twenty-one thousand, one hundred".