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2101010201 = 3229650669
BaseRepresentation
bin111110100111010…
…1101111100011001
312102102102101011122
41331032231330121
513300324311301
6544251535025
7103031202113
oct17516557431
95372371148
102101010201
11988a69074
124a775a475
13276382904
1415d0703b3
15c46b681b
hex7d3adf19

2101010201 has 4 divisors (see below), whose sum is σ = 2101664100. Its totient is φ = 2100356304.

The previous prime is 2101010147. The next prime is 2101010231. The reversal of 2101010201 is 1020101012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1231939801 + 869070400 = 35099^2 + 29480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101010201 - 210 = 2101009177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101010231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322106 + ... + 328563.

It is an arithmetic number, because the mean of its divisors is an integer number (525416025).

Almost surely, 22101010201 is an apocalyptic number.

It is an amenable number.

2101010201 is a deficient number, since it is larger than the sum of its proper divisors (653899).

2101010201 is an equidigital number, since it uses as much as digits as its factorization.

2101010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653898.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2101010201 is about 45836.7778208722. Note that the first 3 decimals coincide. The cubic root of 2101010201 is about 1280.7844721262.

Adding to 2101010201 its reverse (1020101012), we get a palindrome (3121111213).

The spelling of 2101010201 in words is "two billion, one hundred one million, ten thousand, two hundred one".

Divisors: 1 3229 650669 2101010201