12001102020221 has 4 divisors (see below), whose sum is σ = 12001120388700. Its totient is φ = 12001083651744.

The previous prime is 12001102020199. The next prime is 12001102020247. The reversal of 12001102020221 is 12202020110021.

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 2596980595225 + 9404121424996 = 1611515^2 + 3066614^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001102020221 - 2¹⁸ = 12001101758077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001102020196 and 12001102020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001102020421) 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, 8166626 + ... + 9523443.

It is an arithmetic number, because the mean of its divisors is an integer number (3000280097175).

Almost surely, 2^{12001102020221} is an apocalyptic number.

It is an amenable number.

12001102020221 is a deficient number, since it is larger than the sum of its proper divisors (18368479).

12001102020221 is an equidigital number, since it uses as much as digits as its factorization.

12001102020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18368478.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001102020221 its reverse (12202020110021), we get a palindrome (24203122130242).

The spelling of 12001102020221 in words is "twelve trillion, one billion, one hundred two million, twenty thousand, two hundred twenty-one".