12210101 has 2 divisors, whose sum is σ = 12210102. Its totient is φ = 12210100.

The previous prime is 12210067. The next prime is 12210113. The reversal of 12210101 is 10101221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9006001 + 3204100 = 3001^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210101 - 2²² = 8015797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105050 + 6105051.

It is an arithmetic number, because the mean of its divisors is an integer number (6105051).

Almost surely, 2^12210101 is an apocalyptic number.

It is an amenable number.

12210101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210101 is an equidigital number, since it uses as much as digits as its factorization.

12210101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 12210101 is about 3494.2954940875. The cubic root of 12210101 is about 230.2712678358.

Adding to 12210101 its reverse (10101221), we get a palindrome (22311322).

The spelling of 12210101 in words is "twelve million, two hundred ten thousand, one hundred one".