203421430211 has 4 divisors (see below), whose sum is σ = 215387396712. Its totient is φ = 191455463712.

The previous prime is 203421430193. The next prime is 203421430217. The reversal of 203421430211 is 112034124302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203421430211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203421430217) 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, 5982983225 + ... + 5982983258.

It is an arithmetic number, because the mean of its divisors is an integer number (53846849178).

Almost surely, 2^203421430211 is an apocalyptic number.

203421430211 is a deficient number, since it is larger than the sum of its proper divisors (11965966501).

203421430211 is a wasteful number, since it uses less digits than its factorization.

203421430211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11965966500.

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

Adding to 203421430211 its reverse (112034124302), we get a palindrome (315455554513).

The spelling of 203421430211 in words is "two hundred three billion, four hundred twenty-one million, four hundred thirty thousand, two hundred eleven".