1125312011 has 4 divisors (see below), whose sum is σ = 1125622224. Its totient is φ = 1125001800.

The previous prime is 1125311987. The next prime is 1125312017. The reversal of 1125312011 is 1102135211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102135211 = 17 ⋅64831483.

It is a cyclic number.

It is not a de Polignac number, because 1125312011 - 2³⁰ = 51570187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125312017) 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 3 ways as a sum of consecutive naturals, for example, 149600 + ... + 156941.

It is an arithmetic number, because the mean of its divisors is an integer number (281405556).

Almost surely, 2^1125312011 is an apocalyptic number.

1125312011 is a deficient number, since it is larger than the sum of its proper divisors (310213).

1125312011 is an equidigital number, since it uses as much as digits as its factorization.

1125312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310212.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1125312011 is about 33545.6705254195. The cubic root of 1125312011 is about 1040.1380521250.

Adding to 1125312011 its reverse (1102135211), we get a palindrome (2227447222).

The spelling of 1125312011 in words is "one billion, one hundred twenty-five million, three hundred twelve thousand, eleven".