21203231330331 has 12 divisors (see below), whose sum is σ = 31145989525560. Its totient is φ = 13895903018400.

The previous prime is 21203231330279. The next prime is 21203231330363. The reversal of 21203231330331 is 13303313230212.

21203231330331 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 323 + 1 + 3 + 3 + 0 + 331 = 666.

It is not a de Polignac number, because 21203231330331 - 2¹⁷ = 21203231199259 is a prime.

It is a super-2 number, since 2×21203231330331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203231330295 and 21203231330304.

It is not an unprimeable number, because it can be changed into a prime (21203231330371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19965377370 + ... + 19965378431.

It is an arithmetic number, because the mean of its divisors is an integer number (2595499127130).

Almost surely, 2^{21203231330331} is an apocalyptic number.

21203231330331 is a deficient number, since it is larger than the sum of its proper divisors (9942758195229).

21203231330331 is a wasteful number, since it uses less digits than its factorization.

21203231330331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39930755866 (or 39930755863 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21203231330331 its reverse (13303313230212), we get a palindrome (34506544560543).

The spelling of 21203231330331 in words is "twenty-one trillion, two hundred three billion, two hundred thirty-one million, three hundred thirty thousand, three hundred thirty-one".