12021221001222 has 48 divisors (see below), whose sum is σ = 26161311908160. Its totient is φ = 3989351865600.

The previous prime is 12021221001199. The next prime is 12021221001269. The reversal of 12021221001222 is 22210012212021.

It is a happy number.

12021221001222 is a `hidden beast` number, since 1 + 20 + 212 + 210 + 0 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12021221001195 and 12021221001204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5733604 + ... + 7544312.

It is an arithmetic number, because the mean of its divisors is an integer number (545027331420).

Almost surely, 2^{12021221001222} is an apocalyptic number.

12021221001222 is an abundant number, since it is smaller than the sum of its proper divisors (14140090906938).

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

12021221001222 is a wasteful number, since it uses less digits than its factorization.

12021221001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812349 (or 1812346 counting only the distinct ones).

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

Adding to 12021221001222 its reverse (22210012212021), we get a palindrome (34231233213243).

The spelling of 12021221001222 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, one thousand, two hundred twenty-two".