21113133331020 has 96 divisors (see below), whose sum is σ = 63814208209920. Its totient is φ = 5199676204800.

The previous prime is 21113133331019. The next prime is 21113133331097. The reversal of 21113133331020 is 2013333131112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263742256 + ... + 263822295.

It is an arithmetic number, because the mean of its divisors is an integer number (664731335520).

Almost surely, 2^{21113133331020} is an apocalyptic number.

21113133331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113133331020 is an abundant number, since it is smaller than the sum of its proper divisors (42701074878900).

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

21113133331020 is a wasteful number, since it uses less digits than its factorization.

21113133331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527564615 (or 527564613 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21113133331020 its reverse (2013333131112), we get a palindrome (23126466462132).

The spelling of 21113133331020 in words is "twenty-one trillion, one hundred thirteen billion, one hundred thirty-three million, three hundred thirty-one thousand, twenty".