212130321303121 has 4 divisors (see below), whose sum is σ = 228448038326452. Its totient is φ = 195812604279792.

The previous prime is 212130321303091. The next prime is 212130321303161. The reversal of 212130321303121 is 121303123031212.

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 55470678162496 + 156659643140625 = 7447864^2 + 12516375^2 .

It is a cyclic number.

It is not a de Polignac number, because 212130321303121 - 2⁹ = 212130321302609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212130321303161) 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, 8158858511646 + ... + 8158858511671.

It is an arithmetic number, because the mean of its divisors is an integer number (57112009581613).

Almost surely, 2^{212130321303121} is an apocalyptic number.

It is an amenable number.

212130321303121 is a deficient number, since it is larger than the sum of its proper divisors (16317717023331).

212130321303121 is a wasteful number, since it uses less digits than its factorization.

212130321303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317717023330.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 212130321303121 its reverse (121303123031212), we get a palindrome (333433444334333).

The spelling of 212130321303121 in words is "two hundred twelve trillion, one hundred thirty billion, three hundred twenty-one million, three hundred three thousand, one hundred twenty-one".