211113133323121 has 4 divisors (see below), whose sum is σ = 211113523840500. Its totient is φ = 211112742805744.

The previous prime is 211113133323089. The next prime is 211113133323139. The reversal of 211113133323121 is 121323331311112.

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 140738147882721 + 70374985440400 = 11863311^2 + 8388980^2 .

It is a cyclic number.

It is not a de Polignac number, because 211113133323121 - 2⁵ = 211113133323089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211113133323121.

It is not an unprimeable number, because it can be changed into a prime (211113133320121) 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, 194446666 + ... + 195529363.

It is an arithmetic number, because the mean of its divisors is an integer number (52778380960125).

Almost surely, 2^{211113133323121} is an apocalyptic number.

It is an amenable number.

211113133323121 is a deficient number, since it is larger than the sum of its proper divisors (390517379).

211113133323121 is an equidigital number, since it uses as much as digits as its factorization.

211113133323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390517378.

The product of its digits is 1944, while the sum is 28.

Adding to 211113133323121 its reverse (121323331311112), we get a palindrome (332436464634233).

The spelling of 211113133323121 in words is "two hundred eleven trillion, one hundred thirteen billion, one hundred thirty-three million, three hundred twenty-three thousand, one hundred twenty-one".