211321120123123 has 2 divisors, whose sum is σ = 211321120123124. Its totient is φ = 211321120123122.

The previous prime is 211321120122971. The next prime is 211321120123193. The reversal of 211321120123123 is 321321021123112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211321120123123 - 2¹³ = 211321120114931 is a prime.

It is not a weakly prime, because it can be changed into another prime (211321120123193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660560061561 + 105660560061562.

It is an arithmetic number, because the mean of its divisors is an integer number (105660560061562).

Almost surely, 2^{211321120123123} is an apocalyptic number.

211321120123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321120123123 is an equidigital number, since it uses as much as digits as its factorization.

211321120123123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 211321120123123 its reverse (321321021123112), we get a palindrome (532642141246235).

The spelling of 211321120123123 in words is "two hundred eleven trillion, three hundred twenty-one billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twenty-three".