213434010221 has 4 divisors (see below), whose sum is σ = 224667379200. Its totient is φ = 202200641244.

The previous prime is 213434010211. The next prime is 213434010233. The reversal of 213434010221 is 122010434312.

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 213434010221 - 2³⁴ = 196254141037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213434010211) 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, 5616684461 + ... + 5616684498.

It is an arithmetic number, because the mean of its divisors is an integer number (56166844800).

Almost surely, 2^213434010221 is an apocalyptic number.

It is an amenable number.

213434010221 is a deficient number, since it is larger than the sum of its proper divisors (11233368979).

213434010221 is a wasteful number, since it uses less digits than its factorization.

213434010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11233368978.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 213434010221 its reverse (122010434312), we get a palindrome (335444444533).

It can be divided in two parts, 213 and 434010221, that added together give a palindrome (434010434).

The spelling of 213434010221 in words is "two hundred thirteen billion, four hundred thirty-four million, ten thousand, two hundred twenty-one".