213312010121 has 12 divisors (see below), whose sum is σ = 249803828100. Its totient is φ = 181611753120.

The previous prime is 213312010099. The next prime is 213312010181. The reversal of 213312010121 is 121010213312.

It can be written as a sum of positive squares in 2 ways, for example, as 34285706896 + 179026303225 = 185164^2 + 423115^2 .

It is not a de Polignac number, because 213312010121 - 2¹⁴ = 213311993737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213312010121.

It is not an unprimeable number, because it can be changed into a prime (213312010181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14601110 + ... + 14615711.

It is an arithmetic number, because the mean of its divisors is an integer number (20816985675).

Almost surely, 2^213312010121 is an apocalyptic number.

It is an amenable number.

213312010121 is a deficient number, since it is larger than the sum of its proper divisors (36491817979).

213312010121 is a wasteful number, since it uses less digits than its factorization.

213312010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29216984 (or 29216977 counting only the distinct ones).

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

Adding to 213312010121 its reverse (121010213312), we get a palindrome (334322223433).

The spelling of 213312010121 in words is "two hundred thirteen billion, three hundred twelve million, ten thousand, one hundred twenty-one".