21331332021040 has 20 divisors (see below), whose sum is σ = 49595346949104. Its totient is φ = 8532532808384.

The previous prime is 21331332021011. The next prime is 21331332021047. The reversal of 21331332021040 is 4012023313312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21331332020996 and 21331332021014.

It is not an unprimeable number, because it can be changed into a prime (21331332021047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133320825052 + ... + 133320825211.

Almost surely, 2^{21331332021040} is an apocalyptic number.

21331332021040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331332021040 is an abundant number, since it is smaller than the sum of its proper divisors (28264014928064).

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

21331332021040 is a wasteful number, since it uses less digits than its factorization.

21331332021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266641650276 (or 266641650270 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21331332021040 its reverse (4012023313312), we get a palindrome (25343355334352).

The spelling of 21331332021040 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred thirty-two million, twenty-one thousand, forty".