1123135217023 has 4 divisors (see below), whose sum is σ = 1161864017640. Its totient is φ = 1084406416408.

The previous prime is 1123135216997. The next prime is 1123135217033. The reversal of 1123135217023 is 3207125313211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123135217023 is a prime.

It is a super-2 number, since 2×1123135217023² (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 (1123135217033) 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, 19364400265 + ... + 19364400322.

It is an arithmetic number, because the mean of its divisors is an integer number (290466004410).

Almost surely, 2^{1123135217023} is an apocalyptic number.

1123135217023 is a deficient number, since it is larger than the sum of its proper divisors (38728800617).

1123135217023 is an equidigital number, since it uses as much as digits as its factorization.

1123135217023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38728800616.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 1123135217023 in words is "one trillion, one hundred twenty-three billion, one hundred thirty-five million, two hundred seventeen thousand, twenty-three".