12100001711221 has 4 divisors (see below), whose sum is σ = 12115183646412. Its totient is φ = 12084819776032.

The previous prime is 12100001711191. The next prime is 12100001711267. The reversal of 12100001711221 is 12211710000121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4967438000625 + 7132563710596 = 2228775^2 + 2670686^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100001711221 - 2⁷ = 12100001711093 is a prime.

It is a super-2 number, since 2×12100001711221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100001711621) 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 3 ways as a sum of consecutive naturals, for example, 7590966400 + ... + 7590967993.

It is an arithmetic number, because the mean of its divisors is an integer number (3028795911603).

Almost surely, 2^{12100001711221} is an apocalyptic number.

It is an amenable number.

12100001711221 is a deficient number, since it is larger than the sum of its proper divisors (15181935191).

12100001711221 is an equidigital number, since it uses as much as digits as its factorization.

12100001711221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15181935190.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 12100001711221 its reverse (12211710000121), we get a palindrome (24311711711342).

The spelling of 12100001711221 in words is "twelve trillion, one hundred billion, one million, seven hundred eleven thousand, two hundred twenty-one".