21021302231020 has 144 divisors (see below), whose sum is σ = 58555266003360. Its totient is φ = 6261548783616.

The previous prime is 21021302230861. The next prime is 21021302231021. The reversal of 21021302231020 is 2013220312012.

It is not an unprimeable number, because it can be changed into a prime (21021302231021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48313530 + ... + 48746689.

It is an arithmetic number, because the mean of its divisors is an integer number (406633791690).

Almost surely, 2^{21021302231020} is an apocalyptic number.

21021302231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021302231020 is an abundant number, since it is smaller than the sum of its proper divisors (37533963772340).

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

21021302231020 is a wasteful number, since it uses less digits than its factorization.

21021302231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97060272 (or 97060263 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21021302231020 its reverse (2013220312012), we get a palindrome (23034522543032).

The spelling of 21021302231020 in words is "twenty-one trillion, twenty-one billion, three hundred two million, two hundred thirty-one thousand, twenty".