12012201210121 has 4 divisors (see below), whose sum is σ = 13728229954432. Its totient is φ = 10296172465812.

The previous prime is 12012201210047. The next prime is 12012201210167. The reversal of 12012201210121 is 12101210221021.

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 12012201210121 - 2⁹ = 12012201209609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012201210095 and 12012201210104.

It is not an unprimeable number, because it can be changed into a prime (12012201210181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858014372145 + ... + 858014372158.

It is an arithmetic number, because the mean of its divisors is an integer number (3432057488608).

Almost surely, 2^{12012201210121} is an apocalyptic number.

It is an amenable number.

12012201210121 is a deficient number, since it is larger than the sum of its proper divisors (1716028744311).

12012201210121 is an equidigital number, since it uses as much as digits as its factorization.

12012201210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716028744310.

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

Adding to 12012201210121 its reverse (12101210221021), we get a palindrome (24113411431142).

The spelling of 12012201210121 in words is "twelve trillion, twelve billion, two hundred one million, two hundred ten thousand, one hundred twenty-one".