1131031230221 has 4 divisors (see below), whose sum is σ = 1131696936000. Its totient is φ = 1130365524444.

The previous prime is 1131031230181. The next prime is 1131031230349. The reversal of 1131031230221 is 1220321301311.

It is a happy number.

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 not a de Polignac number, because 1131031230221 - 2¹⁸ = 1131030968077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1131031230193 and 1131031230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130031230221) 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, 332850341 + ... + 332853738.

It is an arithmetic number, because the mean of its divisors is an integer number (282924234000).

Almost surely, 2^{1131031230221} is an apocalyptic number.

It is an amenable number.

1131031230221 is a deficient number, since it is larger than the sum of its proper divisors (665705779).

1131031230221 is an equidigital number, since it uses as much as digits as its factorization.

1131031230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665705778.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1131031230221 its reverse (1220321301311), we get a palindrome (2351352531532).

The spelling of 1131031230221 in words is "one trillion, one hundred thirty-one billion, thirty-one million, two hundred thirty thousand, two hundred twenty-one".