21303060231 has 4 divisors (see below), whose sum is σ = 28404080312. Its totient is φ = 14202040152.

The previous prime is 21303060211. The next prime is 21303060287. The reversal of 21303060231 is 13206030312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21303060231 - 2⁵ = 21303060199 is a prime.

It is a super-2 number, since 2×21303060231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303060198 and 21303060207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303060211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550510036 + ... + 3550510041.

It is an arithmetic number, because the mean of its divisors is an integer number (7101020078).

Almost surely, 2^21303060231 is an apocalyptic number.

21303060231 is a deficient number, since it is larger than the sum of its proper divisors (7101020081).

21303060231 is an equidigital number, since it uses as much as digits as its factorization.

21303060231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101020080.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21303060231 its reverse (13206030312), we get a palindrome (34509090543).

The spelling of 21303060231 in words is "twenty-one billion, three hundred three million, sixty thousand, two hundred thirty-one".