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12120212 = 2213613821
BaseRepresentation
bin101110001111…
…000010010100
3211210202210202
4232033002110
511100321322
61111440032
7205006616
oct56170224
924722722
1012120212
116929105
124086018
132684930
141876db6
1510e6292
hexb8f094

12120212 has 24 divisors (see below), whose sum is σ = 23222472. Its totient is φ = 5500800.

The previous prime is 12120181. The next prime is 12120223. The reversal of 12120212 is 21202121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 11930116 = 436^2 + 3454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12120193 and 12120202.

It is a congruent number.

It is an unprimeable number.

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, 1262 + ... + 5082.

It is an arithmetic number, because the mean of its divisors is an integer number (967603).

Almost surely, 212120212 is an apocalyptic number.

It is an amenable number.

12120212 is a deficient number, since it is larger than the sum of its proper divisors (11102260).

12120212 is a wasteful number, since it uses less digits than its factorization.

12120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899 (or 3897 counting only the distinct ones).

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

The square root of 12120212 is about 3481.4094846771. The cubic root of 12120212 is about 229.7048008657.

Adding to 12120212 its reverse (21202121), we get a palindrome (33322333).

The spelling of 12120212 in words is "twelve million, one hundred twenty thousand, two hundred twelve".

Divisors: 1 2 4 13 26 52 61 122 244 793 1586 3172 3821 7642 15284 49673 99346 198692 233081 466162 932324 3030053 6060106 12120212