12021222112002 has 24 divisors (see below), whose sum is σ = 26314496517036. Its totient is φ = 3965763995136.

The previous prime is 12021222111961. The next prime is 12021222112061. The reversal of 12021222112002 is 20021122212021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11162488142961 + 858733969041 = 3341031^2 + 926679^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3442501723 + ... + 3442505214.

Almost surely, 2^{12021222112002} is an apocalyptic number.

12021222112002 is an abundant number, since it is smaller than the sum of its proper divisors (14293274405034).

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

12021222112002 is a wasteful number, since it uses less digits than its factorization.

12021222112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885007042 (or 6885007039 counting only the distinct ones).

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

Adding to 12021222112002 its reverse (20021122212021), we get a palindrome (32042344324023).

The spelling of 12021222112002 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two".