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12021311 is a prime number
BaseRepresentation
bin101101110110…
…111000111111
3211121202010202
4231312320333
511034140221
61105354115
7204115361
oct55667077
924552122
1012021311
116870875
12403893b
13264b903
14184cd31
1510c6d0b
hexb76e3f

12021311 has 2 divisors, whose sum is σ = 12021312. Its totient is φ = 12021310.

The previous prime is 12021299. The next prime is 12021353. The reversal of 12021311 is 11312021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12021311 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021292 and 12021301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12020311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010655 + 6010656.

It is an arithmetic number, because the mean of its divisors is an integer number (6010656).

Almost surely, 212021311 is an apocalyptic number.

12021311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021311 is an equidigital number, since it uses as much as digits as its factorization.

12021311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12021311 is about 3467.1762285756. The cubic root of 12021311 is about 229.0782961678.

Adding to 12021311 its reverse (11312021), we get a palindrome (23333332).

The spelling of 12021311 in words is "twelve million, twenty-one thousand, three hundred eleven".