1231031230203 has 4 divisors (see below), whose sum is σ = 1641374973608. Its totient is φ = 820687486800.

The previous prime is 1231031230199. The next prime is 1231031230349. The reversal of 1231031230203 is 3020321301321.

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

It is not a de Polignac number, because 1231031230203 - 2² = 1231031230199 is a prime.

It is a super-2 number, since 2×1231031230203² (a number of 25 digits) contains 22 as substring.

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 1231031230203.

It is not an unprimeable number, because it can be changed into a prime (1231031232203) 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, 205171871698 + ... + 205171871703.

It is an arithmetic number, because the mean of its divisors is an integer number (410343743402).

Almost surely, 2^{1231031230203} is an apocalyptic number.

1231031230203 is a deficient number, since it is larger than the sum of its proper divisors (410343743405).

1231031230203 is an equidigital number, since it uses as much as digits as its factorization.

1231031230203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410343743404.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1231031230203 its reverse (3020321301321), we get a palindrome (4251352531524).

The spelling of 1231031230203 in words is "one trillion, two hundred thirty-one billion, thirty-one million, two hundred thirty thousand, two hundred three".