12004211221 has 8 divisors (see below), whose sum is σ = 12536112960. Its totient is φ = 11473141152.

The previous prime is 12004211171. The next prime is 12004211231. The reversal of 12004211221 is 12211240021.

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

It is not a de Polignac number, because 12004211221 - 2²⁷ = 11869993493 is a prime.

It is a super-3 number, since 3×12004211221³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12004211195 and 12004211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004211231) 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, 178320 + ... + 236233.

It is an arithmetic number, because the mean of its divisors is an integer number (1567014120).

Almost surely, 2^12004211221 is an apocalyptic number.

It is an amenable number.

12004211221 is a deficient number, since it is larger than the sum of its proper divisors (531901739).

12004211221 is a wasteful number, since it uses less digits than its factorization.

12004211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415835.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12004211221 its reverse (12211240021), we get a palindrome (24215451242).

The spelling of 12004211221 in words is "twelve billion, four million, two hundred eleven thousand, two hundred twenty-one".