1123311401 has 4 divisors (see below), whose sum is σ = 1141726404. Its totient is φ = 1104896400.

The previous prime is 1123311391. The next prime is 1123311437. The reversal of 1123311401 is 1041133211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1041133211 = 977 ⋅1065643.

It can be written as a sum of positive squares in 2 ways, for example, as 86471401 + 1036840000 = 9299^2 + 32200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123311401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123311401.

It is not an unprimeable number, because it can be changed into a prime (1123361401) 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, 9207410 + ... + 9207531.

It is an arithmetic number, because the mean of its divisors is an integer number (285431601).

Almost surely, 2^1123311401 is an apocalyptic number.

It is an amenable number.

1123311401 is a deficient number, since it is larger than the sum of its proper divisors (18415003).

1123311401 is an equidigital number, since it uses as much as digits as its factorization.

1123311401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18415002.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1123311401 is about 33515.8380620267. The cubic root of 1123311401 is about 1039.5212913352.

Adding to 1123311401 its reverse (1041133211), we get a palindrome (2164444612).

The spelling of 1123311401 in words is "one billion, one hundred twenty-three million, three hundred eleven thousand, four hundred one".