1123002331221 has 4 divisors (see below), whose sum is σ = 1497336441632. Its totient is φ = 748668220812.

The previous prime is 1123002331211. The next prime is 1123002331247. The reversal of 1123002331221 is 1221332003211.

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 not a de Polignac number, because 1123002331221 - 2¹¹ = 1123002329173 is a prime.

It is a super-2 number, since 2×1123002331221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123002331211) 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, 187167055201 + ... + 187167055206.

It is an arithmetic number, because the mean of its divisors is an integer number (374334110408).

Almost surely, 2^{1123002331221} is an apocalyptic number.

It is an amenable number.

1123002331221 is a deficient number, since it is larger than the sum of its proper divisors (374334110411).

1123002331221 is an equidigital number, since it uses as much as digits as its factorization.

1123002331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374334110410.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1123002331221 its reverse (1221332003211), we get a palindrome (2344334334432).

The spelling of 1123002331221 in words is "one trillion, one hundred twenty-three billion, two million, three hundred thirty-one thousand, two hundred twenty-one".