213130201121 has 4 divisors (see below), whose sum is σ = 214014559044. Its totient is φ = 212245843200.

The previous prime is 213130201117. The next prime is 213130201147. The reversal of 213130201121 is 121102031312.

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 156930861025 + 56199340096 = 396145^2 + 237064^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130201121 - 2² = 213130201117 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 213130201121.

It is not an unprimeable number, because it can be changed into a prime (213130201621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442178600 + ... + 442179081.

It is an arithmetic number, because the mean of its divisors is an integer number (53503639761).

Almost surely, 2^213130201121 is an apocalyptic number.

It is an amenable number.

213130201121 is a deficient number, since it is larger than the sum of its proper divisors (884357923).

213130201121 is an equidigital number, since it uses as much as digits as its factorization.

213130201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884357922.

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

Adding to 213130201121 its reverse (121102031312), we get a palindrome (334232232433).

The spelling of 213130201121 in words is "two hundred thirteen billion, one hundred thirty million, two hundred one thousand, one hundred twenty-one".