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13121210 = 2519531303
BaseRepresentation
bin110010000011…
…011010111010
3220200121220202
4302003122322
511324334320
61145122202
7216346154
oct62033272
926617822
1013121210
117452183
124489362
13294543b
141a57ad4
151242b75
hexc836ba

13121210 has 32 divisors (see below), whose sum is σ = 25349760. Its totient is φ = 4874688.

The previous prime is 13121209. The next prime is 13121219. The reversal of 13121210 is 1212131.

13121210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13121191 and 13121200.

It is not an unprimeable number, because it can be changed into a prime (13121219) 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, 9419 + ... + 10721.

It is an arithmetic number, because the mean of its divisors is an integer number (792180).

Almost surely, 213121210 is an apocalyptic number.

13121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13121210 is a deficient number, since it is larger than the sum of its proper divisors (12228550).

13121210 is a wasteful number, since it uses less digits than its factorization.

13121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 13121210 is about 3622.3210790873. The cubic root of 13121210 is about 235.8619919917.

Adding to 13121210 its reverse (1212131), we get a palindrome (14333341).

It can be divided in two parts, 13121 and 210, that added together give a palindrome (13331).

The spelling of 13121210 in words is "thirteen million, one hundred twenty-one thousand, two hundred ten".