1123121169 has 9 divisors (see below), whose sum is σ = 1622431369. Its totient is φ = 748680420.

The previous prime is 1123121149. The next prime is 1123121177. The reversal of 1123121169 is 9611213211.

It is a happy number.

The square root of 1123121169 is 33513.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1123121169 - 2¹⁵ = 1123088401 is a prime.

It is a super-2 number, since 2×1123121169² = 2522802320511853122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123121149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94954 + ... + 106124.

Almost surely, 2^1123121169 is an apocalyptic number.

1123121169 is the 33513-rd square number.

1123121169 is the 16757-th centered octagonal number.

It is an amenable number.

1123121169 is a deficient number, since it is larger than the sum of its proper divisors (499310200).

1123121169 is an frugal number, since it uses more digits than its factorization.

1123121169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22348 (or 11174 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The cubic root of 1123121169 is about 1039.4626072878.

It can be divided in two parts, 11231 and 21169, that added together give a square (32400 = 180²).

The spelling of 1123121169 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred sixty-nine".