12021121111000 has 64 divisors (see below), whose sum is σ = 28132045868160. Its totient is φ = 4808000160000.

The previous prime is 12021121110937. The next prime is 12021121111001. The reversal of 12021121111000 is 11112112021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021121111001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10276060 + ... + 11385940.

It is an arithmetic number, because the mean of its divisors is an integer number (439563216690).

Almost surely, 2^{12021121111000} is an apocalyptic number.

12021121111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021121111000 is an abundant number, since it is smaller than the sum of its proper divisors (16110924757160).

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

12021121111000 is a wasteful number, since it uses less digits than its factorization.

12021121111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120733 (or 1120719 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12021121111000 its reverse (11112112021), we get a palindrome (12032233223021).

The spelling of 12021121111000 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, one hundred eleven thousand".