213232113121 has 2 divisors, whose sum is σ = 213232113122. Its totient is φ = 213232113120.

The previous prime is 213232113103. The next prime is 213232113169. The reversal of 213232113121 is 121311232312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127476847521 + 85755265600 = 357039^2 + 292840^2 .

It is a cyclic number.

It is not a de Polignac number, because 213232113121 - 2⁵ = 213232113089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213232113092 and 213232113101.

It is not a weakly prime, because it can be changed into another prime (213232113221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106616056560 + 106616056561.

It is an arithmetic number, because the mean of its divisors is an integer number (106616056561).

Almost surely, 2^213232113121 is an apocalyptic number.

It is an amenable number.

213232113121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213232113121 is an equidigital number, since it uses as much as digits as its factorization.

213232113121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

Adding to 213232113121 its reverse (121311232312), we get a palindrome (334543345433).

The spelling of 213232113121 in words is "two hundred thirteen billion, two hundred thirty-two million, one hundred thirteen thousand, one hundred twenty-one".