1231031202213 has 4 divisors (see below), whose sum is σ = 1641374936288. Its totient is φ = 820687468140.

The previous prime is 1231031202209. The next prime is 1231031202253. The reversal of 1231031202213 is 3122021301321.

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 not a de Polignac number, because 1231031202213 - 2² = 1231031202209 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 1231031202213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231031202253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205171867033 + ... + 205171867038.

It is an arithmetic number, because the mean of its divisors is an integer number (410343734072).

Almost surely, 2^{1231031202213} is an apocalyptic number.

It is an amenable number.

1231031202213 is a deficient number, since it is larger than the sum of its proper divisors (410343734075).

1231031202213 is an equidigital number, since it uses as much as digits as its factorization.

1231031202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410343734074.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1231031202213 its reverse (3122021301321), we get a palindrome (4353052503534).

The spelling of 1231031202213 in words is "one trillion, two hundred thirty-one billion, thirty-one million, two hundred two thousand, two hundred thirteen".