213244041013121 has 4 divisors (see below), whose sum is σ = 215442433188612. Its totient is φ = 211045648837632.

The previous prime is 213244041013093. The next prime is 213244041013177. The reversal of 213244041013121 is 121310140442312.

213244041013121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145538527684225 + 67705513328896 = 12063935^2 + 8228336^2 .

It is a cyclic number.

It is not a de Polignac number, because 213244041013121 - 2¹⁴ = 213244040996737 is a prime.

It is a super-2 number, since 2×213244041013121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244041213121) 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, 1099196087600 + ... + 1099196087793.

It is an arithmetic number, because the mean of its divisors is an integer number (53860608297153).

Almost surely, 2^{213244041013121} is an apocalyptic number.

It is an amenable number.

213244041013121 is a deficient number, since it is larger than the sum of its proper divisors (2198392175491).

213244041013121 is an equidigital number, since it uses as much as digits as its factorization.

213244041013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198392175490.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 213244041013121 its reverse (121310140442312), we get a palindrome (334554181455433).

The spelling of 213244041013121 in words is "two hundred thirteen trillion, two hundred forty-four billion, forty-one million, thirteen thousand, one hundred twenty-one".