211121101010201 has 4 divisors (see below), whose sum is σ = 218401138976100. Its totient is φ = 203841063044304.

The previous prime is 211121101010179. The next prime is 211121101010203. The reversal of 211121101010201 is 102010101121112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88931312515600 + 122189788494601 = 9430340^2 + 11053949^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121101010201 - 2⁶ = 211121101010137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121101010203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3640018982906 + ... + 3640018982963.

It is an arithmetic number, because the mean of its divisors is an integer number (54600284744025).

Almost surely, 2^{211121101010201} is an apocalyptic number.

It is an amenable number.

211121101010201 is a deficient number, since it is larger than the sum of its proper divisors (7280037965899).

211121101010201 is an equidigital number, since it uses as much as digits as its factorization.

211121101010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280037965898.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211121101010201 its reverse (102010101121112), we get a palindrome (313131202131313).

The spelling of 211121101010201 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred one million, ten thousand, two hundred one".