21020231232000 has 1920 divisors, whose sum is σ = 101656626559488. Its totient is φ = 4031741952000.

The previous prime is 21020231231999. The next prime is 21020231232059. The reversal of 21020231232000 is 23213202012.

21020231232000 is a `hidden beast` number, since 2 + 10 + 20 + 2 + 312 + 320 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 576557772 + ... + 576594228.

Almost surely, 2^{21020231232000} is an apocalyptic number.

21020231232000 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 21020231232000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50828313279744).

21020231232000 is an abundant number, since it is smaller than the sum of its proper divisors (80636395327488).

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

21020231232000 is a wasteful number, since it uses less digits than its factorization.

21020231232000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36527 (or 36498 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21020231232000 its reverse (23213202012), we get a palindrome (21043444434012).

The spelling of 21020231232000 in words is "twenty-one trillion, twenty billion, two hundred thirty-one million, two hundred thirty-two thousand".