12001002220121 has 4 divisors (see below), whose sum is σ = 12001027521552. Its totient is φ = 12000976918692.

The previous prime is 12001002220117. The next prime is 12001002220177. The reversal of 12001002220121 is 12102220010021.

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 12001002220121 - 2² = 12001002220117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001002220096 and 12001002220105.

It is not an unprimeable number, because it can be changed into a prime (12001002220111) 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, 11925371 + ... + 12892496.

It is an arithmetic number, because the mean of its divisors is an integer number (3000256880388).

Almost surely, 2^{12001002220121} is an apocalyptic number.

It is an amenable number.

12001002220121 is a deficient number, since it is larger than the sum of its proper divisors (25301431).

12001002220121 is an equidigital number, since it uses as much as digits as its factorization.

12001002220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25301430.

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

Adding to 12001002220121 its reverse (12102220010021), we get a palindrome (24103222230142).

The spelling of 12001002220121 in words is "twelve trillion, one billion, two million, two hundred twenty thousand, one hundred twenty-one".