12100101111221 has 2 divisors, whose sum is σ = 12100101111222. Its totient is φ = 12100101111220.

The previous prime is 12100101111173. The next prime is 12100101111277. The reversal of 12100101111221 is 12211110100121.

12100101111221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12093799132996 + 6301978225 = 3477614^2 + 79385^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100101111221 - 2³⁰ = 12099027369397 is a prime.

It is a super-2 number, since 2×12100101111221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12100101111196 and 12100101111205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100101111821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050050555610 + 6050050555611.

It is an arithmetic number, because the mean of its divisors is an integer number (6050050555611).

Almost surely, 2^{12100101111221} is an apocalyptic number.

It is an amenable number.

12100101111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100101111221 is an equidigital number, since it uses as much as digits as its factorization.

12100101111221 is an evil number, because the sum of its binary digits is even.

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

Adding to 12100101111221 its reverse (12211110100121), we get a palindrome (24311211211342).

The spelling of 12100101111221 in words is "twelve trillion, one hundred billion, one hundred one million, one hundred eleven thousand, two hundred twenty-one".