231120421423 has 2 divisors, whose sum is σ = 231120421424. Its totient is φ = 231120421422.

The previous prime is 231120421417. The next prime is 231120421439. The reversal of 231120421423 is 324124021132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231120421423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231120421723) 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 as a sum of consecutive naturals, namely, 115560210711 + 115560210712.

It is an arithmetic number, because the mean of its divisors is an integer number (115560210712).

Almost surely, 2^231120421423 is an apocalyptic number.

231120421423 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120421423 is an equidigital number, since it uses as much as digits as its factorization.

231120421423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231120421423 its reverse (324124021132), we get a palindrome (555244442555).

The spelling of 231120421423 in words is "two hundred thirty-one billion, one hundred twenty million, four hundred twenty-one thousand, four hundred twenty-three".