21212022021120 has 1056 divisors, whose sum is σ = 86342416767360. Its totient is φ = 4715005870080.

The previous prime is 21212022021107. The next prime is 21212022021163. The reversal of 21212022021120 is 2112022021212.

It is a happy number.

21212022021120 is a `hidden beast` number, since 2 + 1 + 212 + 0 + 220 + 211 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21212022021093 and 21212022021102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1751172184 + ... + 1751184296.

Almost surely, 2^{21212022021120} is an apocalyptic number.

21212022021120 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 21212022021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43171208383680).

21212022021120 is an abundant number, since it is smaller than the sum of its proper divisors (65130394746240).

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

21212022021120 is a wasteful number, since it uses less digits than its factorization.

21212022021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12301 (or 12280 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21212022021120 its reverse (2112022021212), we get a palindrome (23324044042332).

The spelling of 21212022021120 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, twenty-one thousand, one hundred twenty".