21230022000000 has 896 divisors, whose sum is σ = 78061513299840. Its totient is φ = 5068800000000.

The previous prime is 21230021999951. The next prime is 21230022000007. The reversal of 21230022000000 is 22003212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21230022000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230022000007) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4421997600 + ... + 4422002400.

It is an arithmetic number, because the mean of its divisors is an integer number (87122224665).

Almost surely, 2^{21230022000000} is an apocalyptic number.

21230022000000 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 21230022000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39030756649920).

21230022000000 is an abundant number, since it is smaller than the sum of its proper divisors (56831491299840).

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

21230022000000 is an frugal number, since it uses more digits than its factorization.

21230022000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21230022000000 its reverse (22003212), we get a palindrome (21230044003212).

The spelling of 21230022000000 in words is "twenty-one trillion, two hundred thirty billion, twenty-two million", and thus it is an aban number.