213131021124434 has 32 divisors (see below), whose sum is σ = 365823408086400. Its totient is φ = 91227889543680.

The previous prime is 213131021124433. The next prime is 213131021124449. The reversal of 213131021124434 is 434421120131312.

213131021124434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213131021124434.

It is not an unprimeable number, because it can be changed into a prime (213131021124433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288144194 + ... + 288882914.

It is an arithmetic number, because the mean of its divisors is an integer number (11431981502700).

Almost surely, 2^{213131021124434} is an apocalyptic number.

213131021124434 is a deficient number, since it is larger than the sum of its proper divisors (152692386961966).

213131021124434 is a wasteful number, since it uses less digits than its factorization.

213131021124434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764418.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 213131021124434 its reverse (434421120131312), we get a palindrome (647552141255746).

The spelling of 213131021124434 in words is "two hundred thirteen trillion, one hundred thirty-one billion, twenty-one million, one hundred twenty-four thousand, four hundred thirty-four".