21212212001120 has 192 divisors, whose sum is σ = 58613618359296. Its totient is φ = 7102567987200.

The previous prime is 21212212001089. The next prime is 21212212001159. The reversal of 21212212001120 is 2110021221212.

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, 366324170 + ... + 366382070.

It is an arithmetic number, because the mean of its divisors is an integer number (305279262288).

Almost surely, 2^{21212212001120} is an apocalyptic number.

21212212001120 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 21212212001120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29306809179648).

21212212001120 is an abundant number, since it is smaller than the sum of its proper divisors (37401406358176).

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

21212212001120 is a wasteful number, since it uses less digits than its factorization.

21212212001120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65573 (or 65565 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212212001120 its reverse (2110021221212), we get a palindrome (23322233222332).

The spelling of 21212212001120 in words is "twenty-one trillion, two hundred twelve billion, two hundred twelve million, one thousand, one hundred twenty".