21003230331 has 12 divisors (see below), whose sum is σ = 31043534808. Its totient is φ = 13676521824.

The previous prime is 21003230291. The next prime is 21003230341. The reversal of 21003230331 is 13303230012.

21003230331 is a `hidden beast` number, since 2 + 10 + 0 + 323 + 0 + 331 = 666.

It is not a de Polignac number, because 21003230331 - 2¹⁰ = 21003229307 is a prime.

It is a super-2 number, since 2×21003230331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003230341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27135570 + ... + 27136343.

It is an arithmetic number, because the mean of its divisors is an integer number (2586961234).

Almost surely, 2^21003230331 is an apocalyptic number.

21003230331 is a deficient number, since it is larger than the sum of its proper divisors (10040304477).

21003230331 is a wasteful number, since it uses less digits than its factorization.

21003230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54271962 (or 54271959 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21003230331 its reverse (13303230012), we get a palindrome (34306460343).

The spelling of 21003230331 in words is "twenty-one billion, three million, two hundred thirty thousand, three hundred thirty-one".