12100202221221 has 16 divisors (see below), whose sum is σ = 17965111053120. Its totient is φ = 8049302987760.

The previous prime is 12100202221147. The next prime is 12100202221229. The reversal of 12100202221221 is 12212220200121.

It is a happy number.

12100202221221 is a `hidden beast` number, since 1 + 21 + 0 + 0 + 202 + 221 + 221 = 666.

It is not a de Polignac number, because 12100202221221 - 2¹⁸ = 12100201959077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100202221194 and 12100202221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100202221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486056575 + ... + 486081468.

It is an arithmetic number, because the mean of its divisors is an integer number (1122819440820).

Almost surely, 2^{12100202221221} is an apocalyptic number.

It is an amenable number.

12100202221221 is a deficient number, since it is larger than the sum of its proper divisors (5864908831899).

12100202221221 is an equidigital number, since it uses as much as digits as its factorization.

12100202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972138513 (or 972138507 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12100202221221 its reverse (12212220200121), we get a palindrome (24312422421342).

The spelling of 12100202221221 in words is "twelve trillion, one hundred billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".