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1213229999 is a prime number
BaseRepresentation
bin100100001010000…
…0110101110101111
310010112220110200102
41020110012232233
54441041324444
6320215421315
742031166462
oct11024065657
93115813612
101213229999
11572922723
1229a38483b
13164477297
14b71b52d9
15717a084e
hex48506baf

1213229999 has 2 divisors, whose sum is σ = 1213230000. Its totient is φ = 1213229998.

The previous prime is 1213229989. The next prime is 1213230017. The reversal of 1213229999 is 9999223121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999223121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1213229999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213229989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606614999 + 606615000.

It is an arithmetic number, because the mean of its divisors is an integer number (606615000).

Almost surely, 21213229999 is an apocalyptic number.

1213229999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213229999 is an equidigital number, since it uses as much as digits as its factorization.

1213229999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 1213229999 is about 34831.4512904645. The cubic root of 1213229999 is about 1066.5495745275.

The spelling of 1213229999 in words is "one billion, two hundred thirteen million, two hundred twenty-nine thousand, nine hundred ninety-nine".