1210112201801 has 2 divisors, whose sum is σ = 1210112201802. Its totient is φ = 1210112201800.

The previous prime is 1210112201797. The next prime is 1210112201803. The reversal of 1210112201801 is 1081022110121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037138560000 + 172973641801 = 1018400^2 + 415901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210112201801 - 2² = 1210112201797 is a prime.

It is a Sophie Germain prime.

Together with 1210112201803, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1210112201803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605056100900 + 605056100901.

It is an arithmetic number, because the mean of its divisors is an integer number (605056100901).

Almost surely, 2^{1210112201801} is an apocalyptic number.

It is an amenable number.

1210112201801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210112201801 is an equidigital number, since it uses as much as digits as its factorization.

1210112201801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1210112201801 its reverse (1081022110121), we get a palindrome (2291134311922).

The spelling of 1210112201801 in words is "one trillion, two hundred ten billion, one hundred twelve million, two hundred one thousand, eight hundred one".