1125205011 has 48 divisors (see below), whose sum is σ = 1947279360. Its totient is φ = 612152640.

The previous prime is 1125205001. The next prime is 1125205013. The reversal of 1125205011 is 1105025211.

1125205011 is a `hidden beast` number, since 112 + 52 + 0 + 501 + 1 = 666.

It is not a de Polignac number, because 1125205011 - 2¹⁴ = 1125188627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125205013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330126 + ... + 333516.

It is an arithmetic number, because the mean of its divisors is an integer number (40568320).

Almost surely, 2^1125205011 is an apocalyptic number.

1125205011 is a deficient number, since it is larger than the sum of its proper divisors (822074349).

1125205011 is a wasteful number, since it uses less digits than its factorization.

1125205011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656 (or 3653 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1125205011 is about 33544.0756468262. The cubic root of 1125205011 is about 1040.1050839946.

The spelling of 1125205011 in words is "one billion, one hundred twenty-five million, two hundred five thousand, eleven".