21321233310020 has 48 divisors (see below), whose sum is σ = 51254436430848. Its totient is φ = 7298211922560.

The previous prime is 21321233309963. The next prime is 21321233310029. The reversal of 21321233310020 is 2001333212312.

It is a super-3 number, since 3×21321233310020³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21321233310029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124134836 + ... + 124306475.

It is an arithmetic number, because the mean of its divisors is an integer number (1067800758976).

Almost surely, 2^{21321233310020} is an apocalyptic number.

21321233310020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321233310020 is an abundant number, since it is smaller than the sum of its proper divisors (29933203120828).

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

21321233310020 is a wasteful number, since it uses less digits than its factorization.

21321233310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248441940 (or 248441938 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21321233310020 its reverse (2001333212312), we get a palindrome (23322566522332).

The spelling of 21321233310020 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred thirty-three million, three hundred ten thousand, twenty".