1131231030221 has 8 divisors (see below), whose sum is σ = 1136292603264. Its totient is φ = 1126178587120.

The previous prime is 1131231030179. The next prime is 1131231030257. The reversal of 1131231030221 is 1220301321311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131231030221 - 2¹⁸ = 1131230768077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131231030193 and 1131231030202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231030271) 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 7 ways as a sum of consecutive naturals, for example, 2034065 + ... + 2529798.

It is an arithmetic number, because the mean of its divisors is an integer number (142036575408).

Almost surely, 2^{1131231030221} is an apocalyptic number.

It is an amenable number.

1131231030221 is a deficient number, since it is larger than the sum of its proper divisors (5061573043).

1131231030221 is an equidigital number, since it uses as much as digits as its factorization.

1131231030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564971.

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

Adding to 1131231030221 its reverse (1220301321311), we get a palindrome (2351532351532).

The spelling of 1131231030221 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-one million, thirty thousand, two hundred twenty-one".