1210001220011 has 2 divisors, whose sum is σ = 1210001220012. Its totient is φ = 1210001220010.

The previous prime is 1210001219969. The next prime is 1210001220013. The reversal of 1210001220011 is 1100221000121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1210001220011 - 2³⁸ = 935123313067 is a prime.

Together with 1210001220013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210001219974 and 1210001220001.

It is not a weakly prime, because it can be changed into another prime (1210001220013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000610005 + 605000610006.

It is an arithmetic number, because the mean of its divisors is an integer number (605000610006).

Almost surely, 2^{1210001220011} is an apocalyptic number.

1210001220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210001220011 is an equidigital number, since it uses as much as digits as its factorization.

1210001220011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1210001220011 its reverse (1100221000121), we get a palindrome (2310222220132).

The spelling of 1210001220011 in words is "one trillion, two hundred ten billion, one million, two hundred twenty thousand, eleven".