213311110121 has 8 divisors (see below), whose sum is σ = 213745050504. Its totient is φ = 212877579520.

The previous prime is 213311110099. The next prime is 213311110147. The reversal of 213311110121 is 121011113312.

It can be written as a sum of positive squares in 4 ways, for example, as 14563662400 + 198747447721 = 120680^2 + 445811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213311110121 - 2³⁰ = 212237368297 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 213311110121.

It is not an unprimeable number, because it can be changed into a prime (213311110021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950675 + ... + 1153431.

It is an arithmetic number, because the mean of its divisors is an integer number (26718131313).

Almost surely, 2^213311110121 is an apocalyptic number.

It is an amenable number.

213311110121 is a deficient number, since it is larger than the sum of its proper divisors (433940383).

213311110121 is a wasteful number, since it uses less digits than its factorization.

213311110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204891.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 213311110121 its reverse (121011113312), we get a palindrome (334322223433).

The spelling of 213311110121 in words is "two hundred thirteen billion, three hundred eleven million, one hundred ten thousand, one hundred twenty-one".