21102020122223 has 2 divisors, whose sum is σ = 21102020122224. Its totient is φ = 21102020122222.

The previous prime is 21102020122189. The next prime is 21102020122237. The reversal of 21102020122223 is 32222102020112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102020122223 - 2⁶ = 21102020122159 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102020122195 and 21102020122204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102020128223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551010061111 + 10551010061112.

It is an arithmetic number, because the mean of its divisors is an integer number (10551010061112).

Almost surely, 2^{21102020122223} is an apocalyptic number.

21102020122223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102020122223 is an equidigital number, since it uses as much as digits as its factorization.

21102020122223 is an evil number, because the sum of its binary digits is even.

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

Adding to 21102020122223 its reverse (32222102020112), we get a palindrome (53324122142335).

The spelling of 21102020122223 in words is "twenty-one trillion, one hundred two billion, twenty million, one hundred twenty-two thousand, two hundred twenty-three".