21112212101120 has 384 divisors, whose sum is σ = 58487198515200. Its totient is φ = 7164535504896.

The previous prime is 21112212101077. The next prime is 21112212101173. The reversal of 21112212101120 is 2110121221112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4214853176 + ... + 4214858184.

It is an arithmetic number, because the mean of its divisors is an integer number (152310412800).

Almost surely, 2^{21112212101120} is an apocalyptic number.

21112212101120 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 21112212101120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29243599257600).

21112212101120 is an abundant number, since it is smaller than the sum of its proper divisors (37374986414080).

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

21112212101120 is a wasteful number, since it uses less digits than its factorization.

21112212101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633 (or 5613 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112212101120 its reverse (2110121221112), we get a palindrome (23222333322232).

The spelling of 21112212101120 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, one hundred one thousand, one hundred twenty".