21111021230000 has 200 divisors, whose sum is σ = 55128872338848. Its totient is φ = 7782759936000.

The previous prime is 21111021229997. The next prime is 21111021230021. The reversal of 21111021230000 is 3212011112.

It is a tau number, because it is divible by the number of its divisors (200).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83984504 + ... + 84235496.

Almost surely, 2^{21111021230000} is an apocalyptic number.

21111021230000 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 21111021230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27564436169424).

21111021230000 is an abundant number, since it is smaller than the sum of its proper divisors (34017851108848).

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

21111021230000 is a wasteful number, since it uses less digits than its factorization.

21111021230000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251681 (or 251660 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21111021230000 its reverse (3212011112), we get a palindrome (21114233241112).

The spelling of 21111021230000 in words is "twenty-one trillion, one hundred eleven billion, twenty-one million, two hundred thirty thousand".