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2101025009 is a prime number
BaseRepresentation
bin111110100111011…
…0001100011110001
312102102110010111002
41331032301203301
513300330300014
6544252131345
7103031263226
oct17516614361
95372403432
102101025009
11988a79206
124a7766b55
13276389585
1415d07594d
15c46badde
hex7d3b18f1

2101025009 has 2 divisors, whose sum is σ = 2101025010. Its totient is φ = 2101025008.

The previous prime is 2101024957. The next prime is 2101025027. The reversal of 2101025009 is 9005201012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1573312225 + 527712784 = 39665^2 + 22972^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101025009 - 216 = 2100959473 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101025609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050512504 + 1050512505.

It is an arithmetic number, because the mean of its divisors is an integer number (1050512505).

Almost surely, 22101025009 is an apocalyptic number.

It is an amenable number.

2101025009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101025009 is an equidigital number, since it uses as much as digits as its factorization.

2101025009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2101025009 is about 45836.9393502664. The cubic root of 2101025009 is about 1280.7874811250.

The spelling of 2101025009 in words is "two billion, one hundred one million, twenty-five thousand, nine".