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1010220221 = 8911350789
BaseRepresentation
bin111100001101101…
…011110010111101
32121101220111121202
4330031223302331
54032104021341
6244124305245
734014505313
oct7415536275
92541814552
101010220221
1147927444a
122423a2225
131313a805a
149824c0b3
155da4e79b
hex3c36bcbd

1010220221 has 4 divisors (see below), whose sum is σ = 1021571100. Its totient is φ = 998869344.

The previous prime is 1010220161. The next prime is 1010220247. The reversal of 1010220221 is 1220220101.

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 153487321 + 856732900 = 12389^2 + 29270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1010220221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5675306 + ... + 5675483.

It is an arithmetic number, because the mean of its divisors is an integer number (255392775).

Almost surely, 21010220221 is an apocalyptic number.

It is an amenable number.

1010220221 is a deficient number, since it is larger than the sum of its proper divisors (11350879).

1010220221 is an equidigital number, since it uses as much as digits as its factorization.

1010220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350878.

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

The square root of 1010220221 is about 31783.9616945402. The cubic root of 1010220221 is about 1003.3951999050.

Adding to 1010220221 its reverse (1220220101), we get a palindrome (2230440322).

The spelling of 1010220221 in words is "one billion, ten million, two hundred twenty thousand, two hundred twenty-one".

Divisors: 1 89 11350789 1010220221