21231023011000 has 384 divisors, whose sum is σ = 57207526871040. Its totient is φ = 7312801056000.

The previous prime is 21231023010943. The next prime is 21231023011073. The reversal of 21231023011000 is 11032013212.

It is a super-2 number, since 2×21231023011000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 599339289 + ... + 599374711.

It is an arithmetic number, because the mean of its divisors is an integer number (148977934560).

Almost surely, 2^{21231023011000} is an apocalyptic number.

21231023011000 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 21231023011000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28603763435520).

21231023011000 is an abundant number, since it is smaller than the sum of its proper divisors (35976503860040).

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

21231023011000 is a wasteful number, since it uses less digits than its factorization.

21231023011000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35604 (or 35567 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21231023011000 its reverse (11032013212), we get a palindrome (21242055024212).

The spelling of 21231023011000 in words is "twenty-one trillion, two hundred thirty-one billion, twenty-three million, eleven thousand".