12120211221001 has 4 divisors (see below), whose sum is σ = 13052535161092. Its totient is φ = 11187887280912.

The previous prime is 12120211220833. The next prime is 12120211221023. The reversal of 12120211221001 is 10012211202121.

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 5734583300601 + 6385627920400 = 2394699^2 + 2526980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120211221001 - 2¹⁵ = 12120211188233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120211227001) 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, 466161970026 + ... + 466161970051.

It is an arithmetic number, because the mean of its divisors is an integer number (3263133790273).

Almost surely, 2^{12120211221001} is an apocalyptic number.

It is an amenable number.

12120211221001 is a deficient number, since it is larger than the sum of its proper divisors (932323940091).

12120211221001 is an equidigital number, since it uses as much as digits as its factorization.

12120211221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932323940090.

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

Adding to 12120211221001 its reverse (10012211202121), we get a palindrome (22132422423122).

The spelling of 12120211221001 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, one".