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12222013 is a prime number
BaseRepresentation
bin101110100111…
…111000111101
3211222221110011
4232213320331
511112101023
61113543221
7205612456
oct56477075
924887404
1012222013
116998641
124114b11
1326bc07b
1418a212d
15111650d
hexba7e3d

12222013 has 2 divisors, whose sum is σ = 12222014. Its totient is φ = 12222012.

The previous prime is 12221981. The next prime is 12222047. The reversal of 12222013 is 31022221.

Adding to 12222013 its reverse (31022221), we get a palindrome (43244234).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8450649 + 3771364 = 2907^2 + 1942^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222013 - 25 = 12221981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221984 and 12222002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111006 + 6111007.

It is an arithmetic number, because the mean of its divisors is an integer number (6111007).

Almost surely, 212222013 is an apocalyptic number.

It is an amenable number.

12222013 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222013 is an equidigital number, since it uses as much as digits as its factorization.

12222013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12222013 is about 3495.9995709382. Note that the first 3 decimals coincide. The cubic root of 12222013 is about 230.3461266164.

The spelling of 12222013 in words is "twelve million, two hundred twenty-two thousand, thirteen".