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220012121 = 759677951
BaseRepresentation
bin11010001110100…
…01111001011001
3120022222202220002
431013101321121
5422310341441
633455342345
75311033520
oct1507217131
9508882802
10220012121
111032113aa
12618219b5
13367730b4
14213114b7
15144adb9b
hexd1d1e59

220012121 has 16 divisors (see below), whose sum is σ = 259553280. Its totient is φ = 182595600.

The previous prime is 220012103. The next prime is 220012157. The reversal of 220012121 is 121210022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220012121 - 26 = 220012057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220012171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23696 + ... + 31646.

It is an arithmetic number, because the mean of its divisors is an integer number (16222080).

Almost surely, 2220012121 is an apocalyptic number.

It is an amenable number.

220012121 is a deficient number, since it is larger than the sum of its proper divisors (39541159).

220012121 is an equidigital number, since it uses as much as digits as its factorization.

220012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084.

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

The square root of 220012121 is about 14832.8055673901. The cubic root of 220012121 is about 603.6921601706.

Adding to 220012121 its reverse (121210022), we get a palindrome (341222143).

The spelling of 220012121 in words is "two hundred twenty million, twelve thousand, one hundred twenty-one".

Divisors: 1 7 59 67 413 469 3953 7951 27671 55657 469109 532717 3283763 3729019 31430303 220012121