203211221113 has 4 divisors (see below), whose sum is σ = 213906548560. Its totient is φ = 192515893668.

The previous prime is 203211221051. The next prime is 203211221117. The reversal of 203211221113 is 311122112302.

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 a de Polignac number, because none of the positive numbers 2^k-203211221113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 10695327427 = 203211221113 / (2 + 0 + 3 + 2 + 1 + 1 + 2 + 2 + 1 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203211221117) 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, 5347663695 + ... + 5347663732.

It is an arithmetic number, because the mean of its divisors is an integer number (53476637140).

Almost surely, 2^203211221113 is an apocalyptic number.

It is an amenable number.

203211221113 is a deficient number, since it is larger than the sum of its proper divisors (10695327447).

203211221113 is a wasteful number, since it uses less digits than its factorization.

203211221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10695327446.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 203211221113 its reverse (311122112302), we get a palindrome (514333333415).

The spelling of 203211221113 in words is "two hundred three billion, two hundred eleven million, two hundred twenty-one thousand, one hundred thirteen".