1135123201 has 4 divisors (see below), whose sum is σ = 1201895172. Its totient is φ = 1068351232.

The previous prime is 1135123181. The next prime is 1135123211. The reversal of 1135123201 is 1023215311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1023215311 = 41 ⋅24956471.

It can be written as a sum of positive squares in 2 ways, for example, as 703522576 + 431600625 = 26524^2 + 20775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135123201 - 2⁵ = 1135123169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1135123211) 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, 33385960 + ... + 33385993.

It is an arithmetic number, because the mean of its divisors is an integer number (300473793).

Almost surely, 2^1135123201 is an apocalyptic number.

It is an amenable number.

1135123201 is a deficient number, since it is larger than the sum of its proper divisors (66771971).

1135123201 is an equidigital number, since it uses as much as digits as its factorization.

1135123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66771970.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1135123201 is about 33691.5894697772. The cubic root of 1135123201 is about 1043.1521723266.

Adding to 1135123201 its reverse (1023215311), we get a palindrome (2158338512).

The spelling of 1135123201 in words is "one billion, one hundred thirty-five million, one hundred twenty-three thousand, two hundred one".