1123220321123 has 4 divisors (see below), whose sum is σ = 1130658866448. Its totient is φ = 1115781775800.

The previous prime is 1123220321101. The next prime is 1123220321129. The reversal of 1123220321123 is 3211230223211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123220321123 - 2¹⁸ = 1123220058979 is a prime.

It is a super-2 number, since 2×1123220321123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123220321129) 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, 3719272436 + ... + 3719272737.

It is an arithmetic number, because the mean of its divisors is an integer number (282664716612).

Almost surely, 2^{1123220321123} is an apocalyptic number.

1123220321123 is a deficient number, since it is larger than the sum of its proper divisors (7438545325).

1123220321123 is an equidigital number, since it uses as much as digits as its factorization.

1123220321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438545324.

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

Adding to 1123220321123 its reverse (3211230223211), we get a palindrome (4334450544334).

The spelling of 1123220321123 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, three hundred twenty-one thousand, one hundred twenty-three".