21022122121000 has 256 divisors, whose sum is σ = 66047688645120. Its totient is φ = 6048322560000.

The previous prime is 21022122120991. The next prime is 21022122121067. The reversal of 21022122121000 is 12122122012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9499561 + ... + 11501560.

It is an arithmetic number, because the mean of its divisors is an integer number (257998783770).

Almost surely, 2^{21022122121000} is an apocalyptic number.

21022122121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022122121000 is an abundant number, since it is smaller than the sum of its proper divisors (45025566524120).

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

21022122121000 is a wasteful number, since it uses less digits than its factorization.

21022122121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21001173 (or 21001159 counting only the distinct ones).

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

Adding to 21022122121000 its reverse (12122122012), we get a palindrome (21034244243012).

The spelling of 21022122121000 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, one hundred twenty-one thousand".