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21109968899 is a prime number
BaseRepresentation
bin10011101010010000…
…001001000000000011
32000111012010112022222
4103222100021000003
5321213123001044
613410415521255
71345060526555
oct235220110003
960435115288
1021109968899
118a53033098
12411182922b
131cb5638c76
14104389b4d5
158384208ee
hex4ea409003

21109968899 has 2 divisors, whose sum is σ = 21109968900. Its totient is φ = 21109968898.

The previous prime is 21109968883. The next prime is 21109968911. The reversal of 21109968899 is 99886990112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21109968899 - 24 = 21109968883 is a prime.

It is not a weakly prime, because it can be changed into another prime (21109968839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10554984449 + 10554984450.

It is an arithmetic number, because the mean of its divisors is an integer number (10554984450).

Almost surely, 221109968899 is an apocalyptic number.

21109968899 is a deficient number, since it is larger than the sum of its proper divisors (1).

21109968899 is an equidigital number, since it uses as much as digits as its factorization.

21109968899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5038848, while the sum is 62.

The spelling of 21109968899 in words is "twenty-one billion, one hundred nine million, nine hundred sixty-eight thousand, eight hundred ninety-nine".