12001222000 has 40 divisors (see below), whose sum is σ = 29018959632. Its totient is φ = 4800488000.

The previous prime is 12001221949. The next prime is 12001222001. The reversal of 12001222000 is 22210021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222001) 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, 2998306 + ... + 3002305.

Almost surely, 2^12001222000 is an apocalyptic number.

12001222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001222000 is an abundant number, since it is smaller than the sum of its proper divisors (17017737632).

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

12001222000 is an equidigital number, since it uses as much as digits as its factorization.

12001222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000634 (or 6000618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12001222000 its reverse (22210021), we get a palindrome (12023432021).

The spelling of 12001222000 in words is "twelve billion, one million, two hundred twenty-two thousand".