213434414421 has 4 divisors (see below), whose sum is σ = 284579219232. Its totient is φ = 142289609612.

The previous prime is 213434414407. The next prime is 213434414429. The reversal of 213434414421 is 124414434312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213434414421 - 2¹⁰ = 213434413397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213434414429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35572402401 + ... + 35572402406.

It is an arithmetic number, because the mean of its divisors is an integer number (71144804808).

Almost surely, 2^213434414421 is an apocalyptic number.

It is an amenable number.

213434414421 is a deficient number, since it is larger than the sum of its proper divisors (71144804811).

213434414421 is an equidigital number, since it uses as much as digits as its factorization.

213434414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71144804810.

The product of its digits is 36864, while the sum is 33.

Adding to 213434414421 its reverse (124414434312), we get a palindrome (337848848733).

The spelling of 213434414421 in words is "two hundred thirteen billion, four hundred thirty-four million, four hundred fourteen thousand, four hundred twenty-one".