211013130121 has 4 divisors (see below), whose sum is σ = 211016395332. Its totient is φ = 211009864912.

The previous prime is 211013130109. The next prime is 211013130191. The reversal of 211013130121 is 121031310112.

It is a happy number.

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 170394758521 + 40618371600 = 412789^2 + 201540^2 .

It is a cyclic number.

It is not a de Polignac number, because 211013130121 - 2²³ = 211004741513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211013130095 and 211013130104.

It is not an unprimeable number, because it can be changed into a prime (211013130191) 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, 1533670 + ... + 1665583.

It is an arithmetic number, because the mean of its divisors is an integer number (52754098833).

Almost surely, 2^211013130121 is an apocalyptic number.

It is an amenable number.

211013130121 is a deficient number, since it is larger than the sum of its proper divisors (3265211).

211013130121 is an equidigital number, since it uses as much as digits as its factorization.

211013130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265210.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211013130121 its reverse (121031310112), we get a palindrome (332044440233).

The spelling of 211013130121 in words is "two hundred eleven billion, thirteen million, one hundred thirty thousand, one hundred twenty-one".