213232121131 has 4 divisors (see below), whose sum is σ = 213449041872. Its totient is φ = 213015200392.

The previous prime is 213232121129. The next prime is 213232121149. The reversal of 213232121131 is 131121232312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213232121131 - 2¹ = 213232121129 is a prime.

It is a super-2 number, since 2×213232121131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213232121831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108458896 + ... + 108460861.

It is an arithmetic number, because the mean of its divisors is an integer number (53362260468).

Almost surely, 2^213232121131 is an apocalyptic number.

213232121131 is a deficient number, since it is larger than the sum of its proper divisors (216920741).

213232121131 is an equidigital number, since it uses as much as digits as its factorization.

213232121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216920740.

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

Adding to 213232121131 its reverse (131121232312), we get a palindrome (344353353443).

The spelling of 213232121131 in words is "two hundred thirteen billion, two hundred thirty-two million, one hundred twenty-one thousand, one hundred thirty-one".