21111201120000 has 360 divisors, whose sum is σ = 74340826083216. Its totient is φ = 5298495488000.

The previous prime is 21111201119989. The next prime is 21111201120007. The reversal of 21111201120000 is 2110211112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111201120007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6866422 + ... + 9453578.

Almost surely, 2^{21111201120000} is an apocalyptic number.

21111201120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21111201120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37170413041608).

21111201120000 is an abundant number, since it is smaller than the sum of its proper divisors (53229624963216).

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

21111201120000 is an equidigital number, since it uses as much as digits as its factorization.

21111201120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587213 (or 2587184 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21111201120000 its reverse (2110211112), we get a palindrome (21113311331112).

The spelling of 21111201120000 in words is "twenty-one trillion, one hundred eleven billion, two hundred one million, one hundred twenty thousand".