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21102222200 = 2352212949559
BaseRepresentation
bin10011101001110010…
…100101101101111000
32000110122112221212012
4103221302211231320
5321204132102300
613405541505052
71344634633463
oct235162455570
960418487765
1021102222200
118a49721964
12410b112188
131cb3b55c17
1410428422da
158378e0435
hex4e9ca5b78

21102222200 has 48 divisors (see below), whose sum is σ = 49086702000. Its totient is φ = 8436753920.

The previous prime is 21102222191. The next prime is 21102222233. The reversal of 21102222200 is 222220112.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 401021 + ... + 450579.

It is an arithmetic number, because the mean of its divisors is an integer number (1022639625).

Almost surely, 221102222200 is an apocalyptic number.

21102222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102222200 is an abundant number, since it is smaller than the sum of its proper divisors (27984479800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102222200 is a wasteful number, since it uses less digits than its factorization.

21102222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51704 (or 51695 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21102222200 its reverse (222220112), we get a palindrome (21324442312).

The spelling of 21102222200 in words is "twenty-one billion, one hundred two million, two hundred twenty-two thousand, two hundred".

Divisors: 1 2 4 5 8 10 20 25 40 50 100 200 2129 4258 8516 10645 17032 21290 42580 49559 53225 85160 99118 106450 198236 212900 247795 396472 425800 495590 991180 1238975 1982360 2477950 4955900 9911800 105511111 211022222 422044444 527555555 844088888 1055111110 2110222220 2637777775 4220444440 5275555550 10551111100 21102222200