21321331133020 has 96 divisors (see below), whose sum is σ = 45756148838400. Its totient is φ = 8343063181824.

The previous prime is 21321331133009. The next prime is 21321331133023. The reversal of 21321331133020 is 2033113312312.

It is a super-2 number, since 2×21321331133020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321331133023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483597417 + ... + 483641503.

It is an arithmetic number, because the mean of its divisors is an integer number (476626550400).

Almost surely, 2^{21321331133020} is an apocalyptic number.

21321331133020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321331133020 is an abundant number, since it is smaller than the sum of its proper divisors (24434817705380).

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

21321331133020 is a wasteful number, since it uses less digits than its factorization.

21321331133020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46147 (or 46145 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21321331133020 its reverse (2033113312312), we get a palindrome (23354444445332).

The spelling of 21321331133020 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred thirty-one million, one hundred thirty-three thousand, twenty".