21304421330231 has 16 divisors (see below), whose sum is σ = 22965436784640. Its totient is φ = 19646585337600.

The previous prime is 21304421330221. The next prime is 21304421330251. The reversal of 21304421330231 is 13203312440312.

It is not a de Polignac number, because 21304421330231 - 2³⁰ = 21303347588407 is a prime.

It is a super-2 number, since 2×21304421330231² (a number of 27 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 = 21304421330194 and 21304421330203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304421330221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86454611 + ... + 86700683.

It is an arithmetic number, because the mean of its divisors is an integer number (1435339799040).

Almost surely, 2^{21304421330231} is an apocalyptic number.

21304421330231 is a deficient number, since it is larger than the sum of its proper divisors (1661015454409).

21304421330231 is a wasteful number, since it uses less digits than its factorization.

21304421330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252506.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21304421330231 its reverse (13203312440312), we get a palindrome (34507733770543).

The spelling of 21304421330231 in words is "twenty-one trillion, three hundred four billion, four hundred twenty-one million, three hundred thirty thousand, two hundred thirty-one".