21131023323000 has 256 divisors, whose sum is σ = 66129009897600. Its totient is φ = 5617842278400.

The previous prime is 21131023322993. The next prime is 21131023323079. The reversal of 21131023323000 is 32332013112.

It is a congruent 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, 3307403806 + ... + 3307410194.

Almost surely, 2^{21131023323000} is an apocalyptic number.

21131023323000 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 21131023323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33064504948800).

21131023323000 is an abundant number, since it is smaller than the sum of its proper divisors (44997986574600).

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

21131023323000 is a wasteful number, since it uses less digits than its factorization.

21131023323000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9587 (or 9573 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21131023323000 its reverse (32332013112), we get a palindrome (21163355336112).

The spelling of 21131023323000 in words is "twenty-one trillion, one hundred thirty-one billion, twenty-three million, three hundred twenty-three thousand".