12210012001221 has 8 divisors (see below), whose sum is σ = 16369960842144. Its totient is φ = 8095035580560.

The previous prime is 12210012001219. The next prime is 12210012001321. The reversal of 12210012001221 is 12210021001221.

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

It is not a de Polignac number, because 12210012001221 - 2¹ = 12210012001219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12210012001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210012001321) 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, 11243104431 + ... + 11243105516.

It is an arithmetic number, because the mean of its divisors is an integer number (2046245105268).

Almost surely, 2^{12210012001221} is an apocalyptic number.

It is an amenable number.

12210012001221 is a deficient number, since it is larger than the sum of its proper divisors (4159948840923).

12210012001221 is a wasteful number, since it uses less digits than its factorization.

12210012001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22486210131.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12210012001221 its reverse (12210021001221), we get a palindrome (24420033002442).

Subtracting 12210012001221 from its reverse (12210021001221), we obtain a square (9000000 = 3000²).

The spelling of 12210012001221 in words is "twelve trillion, two hundred ten billion, twelve million, one thousand, two hundred twenty-one".