12221212021002 has 12 divisors (see below), whose sum is σ = 26479292712210. Its totient is φ = 4073737340328.

The previous prime is 12221212021001. The next prime is 12221212021049. The reversal of 12221212021002 is 20012021212221.

It is a happy number.

12221212021002 is a `hidden beast` number, since 122 + 212 + 120 + 210 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9032555387241 + 3188656633761 = 3005421^2 + 1785681^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 678956223389 = 12221212021002 / (1 + 2 + 2 + 2 + 1 + 2 + 1 + 2 + 0 + 2 + 1 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (12221212021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339478111677 + ... + 339478111712.

Almost surely, 2^{12221212021002} is an apocalyptic number.

12221212021002 is an abundant number, since it is smaller than the sum of its proper divisors (14258080691208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221212021002 is a wasteful number, since it uses less digits than its factorization.

12221212021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678956223397 (or 678956223394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221212021002 its reverse (20012021212221), we get a palindrome (32233233233223).

The spelling of 12221212021002 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, twenty-one thousand, two".