216200123 has 2 divisors, whose sum is σ = 216200124. Its totient is φ = 216200122.

The previous prime is 216200119. The next prime is 216200137. The reversal of 216200123 is 321002612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216200123 - 2² = 216200119 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (216200623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108100061 + 108100062.

It is an arithmetic number, because the mean of its divisors is an integer number (108100062).

Almost surely, 2^216200123 is an apocalyptic number.

216200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

216200123 is an equidigital number, since it uses as much as digits as its factorization.

216200123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 216200123 is about 14703.7452031787. The cubic root of 216200123 is about 600.1852418773.

Adding to 216200123 its reverse (321002612), we get a palindrome (537202735).

The spelling of 216200123 in words is "two hundred sixteen million, two hundred thousand, one hundred twenty-three".