21023331231000 has 1024 divisors, whose sum is σ = 81226229760000. Its totient is φ = 4417816166400.

The previous prime is 21023331230969. The next prime is 21023331231029. The reversal of 21023331231000 is 13213332012.

It is a super-2 number, since 2×21023331231000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 4522116676 + ... + 4522121324.

It is an arithmetic number, because the mean of its divisors is an integer number (79322490000).

Almost surely, 2^{21023331231000} is an apocalyptic number.

21023331231000 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 21023331231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40613114880000).

21023331231000 is an abundant number, since it is smaller than the sum of its proper divisors (60202898529000).

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

21023331231000 is a wasteful number, since it uses less digits than its factorization.

21023331231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989 (or 4975 counting only the distinct ones).

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

Adding to 21023331231000 its reverse (13213332012), we get a palindrome (21036544563012).

It can be divided in two parts, 2102333 and 1231000, that added together give a palindrome (3333333).

The spelling of 21023331231000 in words is "twenty-one trillion, twenty-three billion, three hundred thirty-one million, two hundred thirty-one thousand".