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12213123220211 = 31393971716781
BaseRepresentation
bin1011000110111001011011…
…0111110000001011110011
31121020120012120000110002212
42301232112313300023303
53100044434021021321
641550344212202335
72400240402336524
oct261562667601363
947216176013085
1012213123220211
113989613731641
121452b9a3093ab
136a7900794304
1430319294284b
15162a5853655b
hexb1b96df02f3

12213123220211 has 4 divisors (see below), whose sum is σ = 12607094937024. Its totient is φ = 11819151503400.

The previous prime is 12213123220187. The next prime is 12213123220217. The reversal of 12213123220211 is 11202232131221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12213123220211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213123220217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196985858360 + ... + 196985858421.

It is an arithmetic number, because the mean of its divisors is an integer number (3151773734256).

Almost surely, 212213123220211 is an apocalyptic number.

12213123220211 is a deficient number, since it is larger than the sum of its proper divisors (393971716813).

12213123220211 is an equidigital number, since it uses as much as digits as its factorization.

12213123220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393971716812.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12213123220211 its reverse (11202232131221), we get a palindrome (23415355351432).

The spelling of 12213123220211 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-three million, two hundred twenty thousand, two hundred eleven".

Divisors: 1 31 393971716781 12213123220211