12221121022000 has 80 divisors (see below), whose sum is σ = 32237095292064. Its totient is φ = 4444044000000.

The previous prime is 12221121021961. The next prime is 12221121022037. The reversal of 12221121022000 is 22012112221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277730751 + ... + 277774750.

Almost surely, 2^{12221121022000} is an apocalyptic number.

12221121022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221121022000 is an abundant number, since it is smaller than the sum of its proper divisors (20015974270064).

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

12221121022000 is a wasteful number, since it uses less digits than its factorization.

12221121022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555505535 (or 555505519 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12221121022000 its reverse (22012112221), we get a palindrome (12243133134221).

The spelling of 12221121022000 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand".