21031135335024 has 160 divisors (see below), whose sum is σ = 55023310187520. Its totient is φ = 6921632342016.

The previous prime is 21031135335019. The next prime is 21031135335061. The reversal of 21031135335024 is 42053353113012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 914664072 + ... + 914687064.

It is an arithmetic number, because the mean of its divisors is an integer number (343895688672).

Almost surely, 2^{21031135335024} is an apocalyptic number.

21031135335024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21031135335024 is an abundant number, since it is smaller than the sum of its proper divisors (33992174852496).

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

21031135335024 is a wasteful number, since it uses less digits than its factorization.

21031135335024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23887 (or 23881 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 21031135335024 its reverse (42053353113012), we get a palindrome (63084488448036).

The spelling of 21031135335024 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-five million, three hundred thirty-five thousand, twenty-four".