213123434134 has 16 divisors (see below), whose sum is σ = 344285041968. Its totient is φ = 98362168992.

The previous prime is 213123434113. The next prime is 213123434143. The reversal of 213123434134 is 431434321312.

213123434134 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213123434096 and 213123434105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299489 + ... + 1454275.

It is an arithmetic number, because the mean of its divisors is an integer number (21517815123).

Almost surely, 2^213123434134 is an apocalyptic number.

213123434134 is a deficient number, since it is larger than the sum of its proper divisors (131161607834).

213123434134 is a wasteful number, since it uses less digits than its factorization.

213123434134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207759.

The product of its digits is 20736, while the sum is 31.

Adding to 213123434134 its reverse (431434321312), we get a palindrome (644557755446).

The spelling of 213123434134 in words is "two hundred thirteen billion, one hundred twenty-three million, four hundred thirty-four thousand, one hundred thirty-four".