21222022220123 has 2 divisors, whose sum is σ = 21222022220124. Its totient is φ = 21222022220122.

The previous prime is 21222022220101. The next prime is 21222022220221. The reversal of 21222022220123 is 32102222022212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222022220123 is a prime.

It is a super-2 number, since 2×21222022220123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21222022220723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611011110061 + 10611011110062.

It is an arithmetic number, because the mean of its divisors is an integer number (10611011110062).

Almost surely, 2^{21222022220123} is an apocalyptic number.

21222022220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222022220123 is an equidigital number, since it uses as much as digits as its factorization.

21222022220123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21222022220123 its reverse (32102222022212), we get a palindrome (53324244242335).

The spelling of 21222022220123 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, two hundred twenty thousand, one hundred twenty-three".