12000012121221 has 8 divisors (see below), whose sum is σ = 16000036545984. Its totient is φ = 7999997888640.

The previous prime is 12000012121219. The next prime is 12000012121271. The reversal of 12000012121221 is 12212121000021.

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

It is not a de Polignac number, because 12000012121221 - 2¹ = 12000012121219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12000012121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000012121271) 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, 844405 + ... + 4971221.

It is an arithmetic number, because the mean of its divisors is an integer number (2000004568248).

Almost surely, 2^{12000012121221} is an apocalyptic number.

It is an amenable number.

12000012121221 is a deficient number, since it is larger than the sum of its proper divisors (4000024424763).

12000012121221 is an equidigital number, since it uses as much as digits as its factorization.

12000012121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096091.

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

Adding to 12000012121221 its reverse (12212121000021), we get a palindrome (24212133121242).

The spelling of 12000012121221 in words is "twelve trillion, twelve million, one hundred twenty-one thousand, two hundred twenty-one".