211212200123 has 2 divisors, whose sum is σ = 211212200124. Its totient is φ = 211212200122.

The previous prime is 211212200113. The next prime is 211212200237. The reversal of 211212200123 is 321002212112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211212200123 - 2⁴ = 211212200107 is a prime.

It is a super-2 number, since 2×211212200123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211212200113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606100061 + 105606100062.

It is an arithmetic number, because the mean of its divisors is an integer number (105606100062).

Almost surely, 2^211212200123 is an apocalyptic number.

211212200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212200123 is an equidigital number, since it uses as much as digits as its factorization.

211212200123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211212200123 its reverse (321002212112), we get a palindrome (532214412235).

The spelling of 211212200123 in words is "two hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred twenty-three".