21231333203020 has 24 divisors (see below), whose sum is σ = 44597554644384. Its totient is φ = 8490294249216.

The previous prime is 21231333203009. The next prime is 21231333203029. The reversal of 21231333203020 is 2030233313212.

It is not an unprimeable number, because it can be changed into a prime (21231333203029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139861744 + ... + 140013463.

It is an arithmetic number, because the mean of its divisors is an integer number (1858231443516).

Almost surely, 2^{21231333203020} is an apocalyptic number.

21231333203020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231333203020 is an abundant number, since it is smaller than the sum of its proper divisors (23366221441364).

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

21231333203020 is a wasteful number, since it uses less digits than its factorization.

21231333203020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279879009 (or 279879007 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21231333203020 its reverse (2030233313212), we get a palindrome (23261566516232).

The spelling of 21231333203020 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-three million, two hundred three thousand, twenty".