21222210200123 has 2 divisors, whose sum is σ = 21222210200124. Its totient is φ = 21222210200122.

The previous prime is 21222210200119. The next prime is 21222210200129. The reversal of 21222210200123 is 32100201222212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222210200123 - 2² = 21222210200119 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222210200095 and 21222210200104.

It is not a weakly prime, because it can be changed into another prime (21222210200129) 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, 10611105100061 + 10611105100062.

It is an arithmetic number, because the mean of its divisors is an integer number (10611105100062).

Almost surely, 2^{21222210200123} is an apocalyptic number.

21222210200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222210200123 is an equidigital number, since it uses as much as digits as its factorization.

21222210200123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21222210200123 its reverse (32100201222212), we get a palindrome (53322411422335).

The spelling of 21222210200123 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, two hundred thousand, one hundred twenty-three".