21022021212000 has 192 divisors, whose sum is σ = 69697881437184. Its totient is φ = 5538331430400.

The previous prime is 21022021211993. The next prime is 21022021212047. The reversal of 21022021212000 is 21212022012.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 9557224 + ... + 11549223.

It is an arithmetic number, because the mean of its divisors is an integer number (363009799152).

Almost surely, 2^{21022021212000} is an apocalyptic number.

21022021212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022021212000 is an abundant number, since it is smaller than the sum of its proper divisors (48675860225184).

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

21022021212000 is a wasteful number, since it uses less digits than its factorization.

21022021212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21106558 (or 21106540 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022021212000 its reverse (21212022012), we get a palindrome (21043233234012).

The spelling of 21022021212000 in words is "twenty-one trillion, twenty-two billion, twenty-one million, two hundred twelve thousand".