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2021009999 is a prime number
BaseRepresentation
bin111100001110110…
…0010101001001111
312012211212221112012
41320131202221033
513114334304444
6532313131435
7101040205301
oct17035425117
95184787465
102021009999
119478977a8
124849b9b7b
13262922408
141525a7971
15bc662b9e
hex78762a4f

2021009999 has 2 divisors, whose sum is σ = 2021010000. Its totient is φ = 2021009998.

The previous prime is 2021009989. The next prime is 2021010053. The reversal of 2021009999 is 9999001202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021009999 - 24 = 2021009983 is a prime.

It is a super-3 number, since 3×20210099993 (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021009989) 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, 1010504999 + 1010505000.

It is an arithmetic number, because the mean of its divisors is an integer number (1010505000).

Almost surely, 22021009999 is an apocalyptic number.

2021009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021009999 is an equidigital number, since it uses as much as digits as its factorization.

2021009999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 2021009999 is about 44955.6447957317. The cubic root of 2021009999 is about 1264.3175140279.

The spelling of 2021009999 in words is "two billion, twenty-one million, nine thousand, nine hundred ninety-nine".