21331004331340 has 48 divisors (see below), whose sum is σ = 48869640368640. Its totient is φ = 7756371922880.

The previous prime is 21331004331337. The next prime is 21331004331409. The reversal of 21331004331340 is 4313340013312.

It is a junction number, because it is equal to n+sod(n) for n = 21331004331299 and 21331004331308.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2584719 + ... + 7024441.

It is an arithmetic number, because the mean of its divisors is an integer number (1018117507680).

Almost surely, 2^{21331004331340} is an apocalyptic number.

21331004331340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331004331340 is an abundant number, since it is smaller than the sum of its proper divisors (27538636037300).

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

21331004331340 is a wasteful number, since it uses less digits than its factorization.

21331004331340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461582 (or 4461580 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21331004331340 its reverse (4313340013312), we get a palindrome (25644344344652).

The spelling of 21331004331340 in words is "twenty-one trillion, three hundred thirty-one billion, four million, three hundred thirty-one thousand, three hundred forty".