12100020001221 has 8 divisors (see below), whose sum is σ = 16982484212320. Its totient is φ = 7642117895472.

The previous prime is 12100020001213. The next prime is 12100020001241. The reversal of 12100020001221 is 12210002000121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12100020001221 - 2³ = 12100020001213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100020001197 and 12100020001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100020001241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106140526270 + ... + 106140526383.

It is an arithmetic number, because the mean of its divisors is an integer number (2122810526540).

Almost surely, 2^{12100020001221} is an apocalyptic number.

It is an amenable number.

12100020001221 is a deficient number, since it is larger than the sum of its proper divisors (4882464211099).

12100020001221 is a wasteful number, since it uses less digits than its factorization.

12100020001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212281052675.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12100020001221 its reverse (12210002000121), we get a palindrome (24310022001342).

The spelling of 12100020001221 in words is "twelve trillion, one hundred billion, twenty million, one thousand, two hundred twenty-one".