1123103211123 has 4 divisors (see below), whose sum is σ = 1497470948168. Its totient is φ = 748735474080.

The previous prime is 1123103211103. The next prime is 1123103211157. The reversal of 1123103211123 is 3211123013211.

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

It is not a de Polignac number, because 1123103211123 - 2⁹ = 1123103210611 is a prime.

It is a super-2 number, since 2×1123103211123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123103211123.

It is not an unprimeable number, because it can be changed into a prime (1123103211103) 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, 187183868518 + ... + 187183868523.

It is an arithmetic number, because the mean of its divisors is an integer number (374367737042).

Almost surely, 2^{1123103211123} is an apocalyptic number.

1123103211123 is a deficient number, since it is larger than the sum of its proper divisors (374367737045).

1123103211123 is an equidigital number, since it uses as much as digits as its factorization.

1123103211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374367737044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1123103211123 its reverse (3211123013211), we get a palindrome (4334226224334).

The spelling of 1123103211123 in words is "one trillion, one hundred twenty-three billion, one hundred three million, two hundred eleven thousand, one hundred twenty-three".