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220210121 = 717342487
BaseRepresentation
bin11010010000000…
…10001111001001
3120100100211111102
431020002033021
5422333210441
633503511145
75312520005
oct1510021711
9510324442
10220210121
1110333713a
12618b84b5
1336812261
1421363705
15144ec69b
hexd2023c9

220210121 has 8 divisors (see below), whose sum is σ = 226376064. Its totient is φ = 214129440.

The previous prime is 220210103. The next prime is 220210141. The reversal of 220210121 is 121012022.

Adding to 220210121 its reverse (121012022), we get a palindrome (341222143).

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220210121 - 214 = 220193737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220210141) 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 in 7 ways as a sum of consecutive naturals, for example, 16061 + ... + 26426.

It is an arithmetic number, because the mean of its divisors is an integer number (28297008).

Almost surely, 2220210121 is an apocalyptic number.

It is an amenable number.

220210121 is a deficient number, since it is larger than the sum of its proper divisors (6165943).

220210121 is an equidigital number, since it uses as much as digits as its factorization.

220210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42631.

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

The square root of 220210121 is about 14839.4784611859. The cubic root of 220210121 is about 603.8732035418.

The spelling of 220210121 in words is "two hundred twenty million, two hundred ten thousand, one hundred twenty-one".

Divisors: 1 71 73 5183 42487 3016577 3101551 220210121