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2221001201 = 4154170761
BaseRepresentation
bin1000010001100001…
…1100100111110001
312201210012112212202
42010120130213301
514022034014301
61004215432545
7106016125106
oct20430344761
95653175782
102221001201
11a3a774091
1251b985755
132951a56c3
14170d86aad
15ceeb966b
hex8461c9f1

2221001201 has 4 divisors (see below), whose sum is σ = 2275172004. Its totient is φ = 2166830400.

The previous prime is 2221001179. The next prime is 2221001203. The reversal of 2221001201 is 1021001222.

It is a happy number.

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 1281640000 + 939361201 = 35800^2 + 30649^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221001201 - 222 = 2216806897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221001203) 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, 27085340 + ... + 27085421.

It is an arithmetic number, because the mean of its divisors is an integer number (568793001).

Almost surely, 22221001201 is an apocalyptic number.

It is an amenable number.

2221001201 is a deficient number, since it is larger than the sum of its proper divisors (54170803).

2221001201 is an equidigital number, since it uses as much as digits as its factorization.

2221001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54170802.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2221001201 is about 47127.4994138242. The cubic root of 2221001201 is about 1304.7168297778.

Adding to 2221001201 its reverse (1021001222), we get a palindrome (3242002423).

The spelling of 2221001201 in words is "two billion, two hundred twenty-one million, one thousand, two hundred one".

Divisors: 1 41 54170761 2221001201