Search a number
BaseRepresentation
bin101110001010…
…100101110001
3211202211211021
4232022211301
511044231001
61111215441
7204602542
oct56124561
924684737
1012102001
11691645a
124077581
132679562
1418704c9
1510e0ba1
hexb8a971

12102001 has 2 divisors, whose sum is σ = 12102002. Its totient is φ = 12102000.

The previous prime is 12101927. The next prime is 12102017. The reversal of 12102001 is 10020121.

12102001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11723776 + 378225 = 3424^2 + 615^2 .

It is an emirp because it is prime and its reverse (10020121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12102001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12102091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051000 + 6051001.

It is an arithmetic number, because the mean of its divisors is an integer number (6051001).

Almost surely, 212102001 is an apocalyptic number.

It is an amenable number.

12102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102001 is an equidigital number, since it uses as much as digits as its factorization.

12102001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12102001 is about 3478.7930378222. The cubic root of 12102001 is about 229.5896969663.

Adding to 12102001 its reverse (10020121), we get a palindrome (22122122).

The spelling of 12102001 in words is "twelve million, one hundred two thousand, one".