21230203130231 has 2 divisors, whose sum is σ = 21230203130232. Its totient is φ = 21230203130230.

The previous prime is 21230203130209. The next prime is 21230203130243. The reversal of 21230203130231 is 13203130203212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230203130231 is a prime.

It is a super-2 number, since 2×21230203130231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21230203130197 and 21230203130206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230203130291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615101565115 + 10615101565116.

It is an arithmetic number, because the mean of its divisors is an integer number (10615101565116).

Almost surely, 2^{21230203130231} is an apocalyptic number.

21230203130231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230203130231 is an equidigital number, since it uses as much as digits as its factorization.

21230203130231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21230203130231 its reverse (13203130203212), we get a palindrome (34433333333443).

The spelling of 21230203130231 in words is "twenty-one trillion, two hundred thirty billion, two hundred three million, one hundred thirty thousand, two hundred thirty-one".