1125135551105 has 4 divisors (see below), whose sum is σ = 1350162661332. Its totient is φ = 900108440880.

The previous prime is 1125135551101. The next prime is 1125135551149. The reversal of 1125135551105 is 5011555315211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 587528382016 + 537607169089 = 766504^2 + 733217^2 .

It is not a de Polignac number, because 1125135551105 - 2² = 1125135551101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125135551101) 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, 112513555106 + ... + 112513555115.

It is an arithmetic number, because the mean of its divisors is an integer number (337540665333).

Almost surely, 2^{1125135551105} is an apocalyptic number.

It is an amenable number.

1125135551105 is a deficient number, since it is larger than the sum of its proper divisors (225027110227).

1125135551105 is an equidigital number, since it uses as much as digits as its factorization.

1125135551105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225027110226.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 1125135551105 in words is "one trillion, one hundred twenty-five billion, one hundred thirty-five million, five hundred fifty-one thousand, one hundred five".