1123322031221 has 4 divisors (see below), whose sum is σ = 1209731418252. Its totient is φ = 1036912644192.

The previous prime is 1123322031193. The next prime is 1123322031239. The reversal of 1123322031221 is 1221302233211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 738319155025 + 385002876196 = 859255^2 + 620486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123322031221 - 2⁶ = 1123322031157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129322031221) 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, 43204693496 + ... + 43204693521.

It is an arithmetic number, because the mean of its divisors is an integer number (302432854563).

Almost surely, 2^{1123322031221} is an apocalyptic number.

It is an amenable number.

1123322031221 is a deficient number, since it is larger than the sum of its proper divisors (86409387031).

1123322031221 is an equidigital number, since it uses as much as digits as its factorization.

1123322031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86409387030.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1123322031221 its reverse (1221302233211), we get a palindrome (2344624264432).

The spelling of 1123322031221 in words is "one trillion, one hundred twenty-three billion, three hundred twenty-two million, thirty-one thousand, two hundred twenty-one".