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2220011221 = 231031138293
BaseRepresentation
bin1000010001010010…
…1010111011010101
312201201100020212211
42010110222323111
514021310324341
61004142313421
7106004532631
oct20424527325
95651306784
102220011221
11a3a15831a
1251b588871
13294c19c0c
14170ba9dc1
15ced71181
hex8452aed5

2220011221 has 16 divisors (see below), whose sum is σ = 2360007936. Its totient is φ = 2084011776.

The previous prime is 2220011203. The next prime is 2220011273. The reversal of 2220011221 is 1221100222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2220011221 - 231 = 72527573 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 (2220011021) 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, 263551 + ... + 271843.

It is an arithmetic number, because the mean of its divisors is an integer number (147500496).

Almost surely, 22220011221 is an apocalyptic number.

It is an amenable number.

2220011221 is a deficient number, since it is larger than the sum of its proper divisors (139996715).

2220011221 is a wasteful number, since it uses less digits than its factorization.

2220011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2220011221 is about 47116.9950336394. The cubic root of 2220011221 is about 1304.5229479188.

Adding to 2220011221 its reverse (1221100222), we get a palindrome (3441111443).

The spelling of 2220011221 in words is "two billion, two hundred twenty million, eleven thousand, two hundred twenty-one".