12221072404100 has 144 divisors (see below), whose sum is σ = 30936434524800. Its totient is φ = 4188776054400.

The previous prime is 12221072404091. The next prime is 12221072404103. The reversal of 12221072404100 is 140427012221.

It is a happy number.

It is a super-2 number, since 2×12221072404100² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12221072404100.

It is not an unprimeable number, because it can be changed into a prime (12221072404103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113376230 + ... + 113483970.

Almost surely, 2^{12221072404100} is an apocalyptic number.

12221072404100 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 12221072404100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15468217262400).

12221072404100 is an abundant number, since it is smaller than the sum of its proper divisors (18715362120700).

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

12221072404100 is a wasteful number, since it uses less digits than its factorization.

12221072404100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111083 (or 111062 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

Adding to 12221072404100 its reverse (140427012221), we get a palindrome (12361499416321).

The spelling of 12221072404100 in words is "twelve trillion, two hundred twenty-one billion, seventy-two million, four hundred four thousand, one hundred".