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12101212 = 2217251709
BaseRepresentation
bin101110001010…
…011001011100
3211202210202001
4232022121130
511044214322
61111212044
7204600334
oct56123134
924683661
1012101212
116915902
124077024
1326790a6
1418700c4
1510e0827
hexb8a65c

12101212 has 24 divisors (see below), whose sum is σ = 22543920. Its totient is φ = 5664000.

The previous prime is 12101179. The next prime is 12101227. The reversal of 12101212 is 21210121.

Adding to 12101212 its reverse (21210121), we get a palindrome (33311333).

It can be divided in two parts, 1210121 and 2, that multiplied together give a palindrome (2420242).

12101212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12101212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16714 + ... + 17422.

It is an arithmetic number, because the mean of its divisors is an integer number (939330).

Almost surely, 212101212 is an apocalyptic number.

It is an amenable number.

12101212 is a deficient number, since it is larger than the sum of its proper divisors (10442708).

12101212 is a wasteful number, since it uses less digits than its factorization.

12101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12101212 is about 3478.6796345740. The cubic root of 12101212 is about 229.5847074276.

The spelling of 12101212 in words is "twelve million, one hundred one thousand, two hundred twelve".

Divisors: 1 2 4 17 34 68 251 502 709 1004 1418 2836 4267 8534 12053 17068 24106 48212 177959 355918 711836 3025303 6050606 12101212