213103201121 has 4 divisors (see below), whose sum is σ = 213119742612. Its totient is φ = 213086659632.

The previous prime is 213103201111. The next prime is 213103201139. The reversal of 213103201121 is 121102301312.

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 172589562721 + 40513638400 = 415439^2 + 201280^2 .

It is a cyclic number.

It is not a de Polignac number, because 213103201121 - 2¹⁸ = 213102938977 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 213103201121.

It is not an unprimeable number, because it can be changed into a prime (213103201111) 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, 8251406 + ... + 8277191.

It is an arithmetic number, because the mean of its divisors is an integer number (53279935653).

Almost surely, 2^213103201121 is an apocalyptic number.

It is an amenable number.

213103201121 is a deficient number, since it is larger than the sum of its proper divisors (16541491).

213103201121 is a wasteful number, since it uses less digits than its factorization.

213103201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16541490.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213103201121 its reverse (121102301312), we get a palindrome (334205502433).

The spelling of 213103201121 in words is "two hundred thirteen billion, one hundred three million, two hundred one thousand, one hundred twenty-one".