1021201110211 has 4 divisors (see below), whose sum is σ = 1023983674912. Its totient is φ = 1018418545512.

The previous prime is 1021201110199. The next prime is 1021201110221. The reversal of 1021201110211 is 1120111021201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021201110211 - 2³⁹ = 471445296323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021201110191 and 1021201110200.

It is not an unprimeable number, because it can be changed into a prime (1021201110221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391281800 + ... + 1391282533.

It is an arithmetic number, because the mean of its divisors is an integer number (255995918728).

Almost surely, 2^{1021201110211} is an apocalyptic number.

1021201110211 is a deficient number, since it is larger than the sum of its proper divisors (2782564701).

1021201110211 is an equidigital number, since it uses as much as digits as its factorization.

1021201110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782564700.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021201110211 its reverse (1120111021201), we get a palindrome (2141312131412).

The spelling of 1021201110211 in words is "one trillion, twenty-one billion, two hundred one million, one hundred ten thousand, two hundred eleven".