12120112001221 has 4 divisors (see below), whose sum is σ = 13851556572832. Its totient is φ = 10388667429612.

The previous prime is 12120112001183. The next prime is 12120112001237. The reversal of 12120112001221 is 12210021102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12120112001221 - 2⁷ = 12120112001093 is a prime.

It is a super-2 number, since 2×12120112001221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120112001195 and 12120112001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120112001251) 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 3 ways as a sum of consecutive naturals, for example, 865722285795 + ... + 865722285808.

It is an arithmetic number, because the mean of its divisors is an integer number (3462889143208).

Almost surely, 2^{12120112001221} is an apocalyptic number.

It is an amenable number.

12120112001221 is a deficient number, since it is larger than the sum of its proper divisors (1731444571611).

12120112001221 is an equidigital number, since it uses as much as digits as its factorization.

12120112001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731444571610.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12120112001221 its reverse (12210021102121), we get a palindrome (24330133103342).

The spelling of 12120112001221 in words is "twelve trillion, one hundred twenty billion, one hundred twelve million, one thousand, two hundred twenty-one".