211121123130023 has 2 divisors, whose sum is σ = 211121123130024. Its totient is φ = 211121123130022.

The previous prime is 211121123130013. The next prime is 211121123130161. The reversal of 211121123130023 is 320031321121112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121123130023 - 2⁸ = 211121123129767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121123130013) 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, 105560561565011 + 105560561565012.

It is an arithmetic number, because the mean of its divisors is an integer number (105560561565012).

Almost surely, 2^{211121123130023} is an apocalyptic number.

211121123130023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121123130023 is an equidigital number, since it uses as much as digits as its factorization.

211121123130023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 211121123130023 its reverse (320031321121112), we get a palindrome (531152444251135).

The spelling of 211121123130023 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-three million, one hundred thirty thousand, twenty-three".