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12222211 is a prime number
BaseRepresentation
bin101110100111…
…111100000011
3211222221201111
4232213330003
511112102321
61113544151
7205613161
oct56477403
924887644
1012222211
116998801
124115057
1326bc1a1
1418a2231
1511165e1
hexba7f03

12222211 has 2 divisors, whose sum is σ = 12222212. Its totient is φ = 12222210.

The previous prime is 12222151. The next prime is 12222241. The reversal of 12222211 is 11222221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12222211 - 213 = 12214019 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222191 and 12222200.

It is not a weakly prime, because it can be changed into another prime (12222241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111105 + 6111106.

It is an arithmetic number, because the mean of its divisors is an integer number (6111106).

Almost surely, 212222211 is an apocalyptic number.

12222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222211 is an equidigital number, since it uses as much as digits as its factorization.

12222211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 13.

The square root of 12222211 is about 3496.0278889048. The cubic root of 12222211 is about 230.3473705001.

Adding to 12222211 its reverse (11222221), we get a palindrome (23444432).

The spelling of 12222211 in words is "twelve million, two hundred twenty-two thousand, two hundred eleven".