22021212112000 has 128 divisors (see below), whose sum is σ = 54783749245680. Its totient is φ = 8803093504000.

The previous prime is 22021212111889. The next prime is 22021212112037. The reversal of 22021212112000 is 21121212022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 377949530176 + 21643262581824 = 614776^2 + 4652232^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25771620 + ... + 26612380.

Almost surely, 2^{22021212112000} is an apocalyptic number.

22021212112000 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 22021212112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27391874622840).

22021212112000 is an abundant number, since it is smaller than the sum of its proper divisors (32762537133680).

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

22021212112000 is an equidigital number, since it uses as much as digits as its factorization.

22021212112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842427 (or 842405 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021212112000 its reverse (21121212022), we get a palindrome (22042333324022).

The spelling of 22021212112000 in words is "twenty-two trillion, twenty-one billion, two hundred twelve million, one hundred twelve thousand".