21331232041040 has 20 divisors (see below), whose sum is σ = 49595114495604. Its totient is φ = 8532492816384.

The previous prime is 21331232041003. The next prime is 21331232041051. The reversal of 21331232041040 is 4014023213312.

It can be written as a sum of positive squares in 2 ways, for example, as 4561846679104 + 16769385361936 = 2135848^2 + 4095044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133320200177 + ... + 133320200336.

Almost surely, 2^{21331232041040} is an apocalyptic number.

21331232041040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331232041040 is an abundant number, since it is smaller than the sum of its proper divisors (28263882454564).

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

21331232041040 is a wasteful number, since it uses less digits than its factorization.

21331232041040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266640400526 (or 266640400520 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21331232041040 its reverse (4014023213312), we get a palindrome (25345255254352).

The spelling of 21331232041040 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred thirty-two million, forty-one thousand, forty".