21230442034231 has 2 divisors, whose sum is σ = 21230442034232. Its totient is φ = 21230442034230.

The previous prime is 21230442034213. The next prime is 21230442034283. The reversal of 21230442034231 is 13243024403212.

Together with previous prime (21230442034213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21230442034231 - 2⁷ = 21230442034103 is a prime.

It is a super-2 number, since 2×21230442034231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21230442034193 and 21230442034202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230442034331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615221017115 + 10615221017116.

It is an arithmetic number, because the mean of its divisors is an integer number (10615221017116).

Almost surely, 2^{21230442034231} is an apocalyptic number.

21230442034231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230442034231 is an equidigital number, since it uses as much as digits as its factorization.

21230442034231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21230442034231 its reverse (13243024403212), we get a palindrome (34473466437443).

The spelling of 21230442034231 in words is "twenty-one trillion, two hundred thirty billion, four hundred forty-two million, thirty-four thousand, two hundred thirty-one".