211121210200123 has 2 divisors, whose sum is σ = 211121210200124. Its totient is φ = 211121210200122.

The previous prime is 211121210200099. The next prime is 211121210200127. The reversal of 211121210200123 is 321002012121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121210200123 - 2²⁹ = 211120673329211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211121210200123.

It is not a weakly prime, because it can be changed into another prime (211121210200127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560605100061 + 105560605100062.

It is an arithmetic number, because the mean of its divisors is an integer number (105560605100062).

Almost surely, 2^{211121210200123} is an apocalyptic number.

211121210200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121210200123 is an equidigital number, since it uses as much as digits as its factorization.

211121210200123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211121210200123 its reverse (321002012121112), we get a palindrome (532123222321235).

The spelling of 211121210200123 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred ten million, two hundred thousand, one hundred twenty-three".