203231021223 has 4 divisors (see below), whose sum is σ = 270974694968. Its totient is φ = 135487347480.

The previous prime is 203231021219. The next prime is 203231021237. The reversal of 203231021223 is 322120132302.

It is a happy number.

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

It is not a de Polignac number, because 203231021223 - 2² = 203231021219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203231021223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231021023) 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, 33871836868 + ... + 33871836873.

It is an arithmetic number, because the mean of its divisors is an integer number (67743673742).

Almost surely, 2^203231021223 is an apocalyptic number.

203231021223 is a deficient number, since it is larger than the sum of its proper divisors (67743673745).

203231021223 is an equidigital number, since it uses as much as digits as its factorization.

203231021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67743673744.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203231021223 its reverse (322120132302), we get a palindrome (525351153525).

The spelling of 203231021223 in words is "two hundred three billion, two hundred thirty-one million, twenty-one thousand, two hundred twenty-three".