1122213231221 has 4 divisors (see below), whose sum is σ = 1188225774252. Its totient is φ = 1056200688192.

The previous prime is 1122213231199. The next prime is 1122213231229. The reversal of 1122213231221 is 1221323122211.

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 561167290321 + 561045940900 = 749111^2 + 749030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122213231221 - 2⁶ = 1122213231157 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 (1122213231229) 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, 33006271490 + ... + 33006271523.

It is an arithmetic number, because the mean of its divisors is an integer number (297056443563).

Almost surely, 2^{1122213231221} is an apocalyptic number.

It is an amenable number.

1122213231221 is a deficient number, since it is larger than the sum of its proper divisors (66012543031).

1122213231221 is an equidigital number, since it uses as much as digits as its factorization.

1122213231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66012543030.

The product of its digits is 576, while the sum is 23.

Adding to 1122213231221 its reverse (1221323122211), we get a palindrome (2343536353432).

The spelling of 1122213231221 in words is "one trillion, one hundred twenty-two billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred twenty-one".