1131223330221 has 4 divisors (see below), whose sum is σ = 1508297773632. Its totient is φ = 754148886812.

The previous prime is 1131223330141. The next prime is 1131223330261. The reversal of 1131223330221 is 1220333221311.

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 1131223330221 - 2¹⁴ = 1131223313837 is a prime.

It is a super-2 number, since 2×1131223330221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131223330191 and 1131223330200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131223330261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188537221701 + ... + 188537221706.

It is an arithmetic number, because the mean of its divisors is an integer number (377074443408).

Almost surely, 2^{1131223330221} is an apocalyptic number.

It is an amenable number.

1131223330221 is a deficient number, since it is larger than the sum of its proper divisors (377074443411).

1131223330221 is an equidigital number, since it uses as much as digits as its factorization.

1131223330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377074443410.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1131223330221 its reverse (1220333221311), we get a palindrome (2351556551532).

The spelling of 1131223330221 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".