21222010101223 has 2 divisors, whose sum is σ = 21222010101224. Its totient is φ = 21222010101222.

The previous prime is 21222010101209. The next prime is 21222010101251. The reversal of 21222010101223 is 32210101022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222010101223 - 2³⁷ = 21084571147751 is a prime.

It is a super-2 number, since 2×21222010101223² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21222010101223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222010101263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005050611 + 10611005050612.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005050612).

Almost surely, 2^{21222010101223} is an apocalyptic number.

21222010101223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010101223 is an equidigital number, since it uses as much as digits as its factorization.

21222010101223 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 19.

Adding to 21222010101223 its reverse (32210101022212), we get a palindrome (53432111123435).

The spelling of 21222010101223 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred one thousand, two hundred twenty-three".