21222010112123 has 2 divisors, whose sum is σ = 21222010112124. Its totient is φ = 21222010112122.

The previous prime is 21222010112077. The next prime is 21222010112183. The reversal of 21222010112123 is 32121101022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222010112123 - 2¹² = 21222010108027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222010112095 and 21222010112104.

It is not a weakly prime, because it can be changed into another prime (21222010112183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005056061 + 10611005056062.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005056062).

Almost surely, 2^{21222010112123} is an apocalyptic number.

21222010112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010112123 is an equidigital number, since it uses as much as digits as its factorization.

21222010112123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21222010112123 its reverse (32121101022212), we get a palindrome (53343111134335).

The spelling of 21222010112123 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred twelve thousand, one hundred twenty-three".