11525120871 has 16 divisors (see below), whose sum is σ = 17646119040. Its totient is φ = 6617293920.

The previous prime is 11525120837. The next prime is 11525120897. The reversal of 11525120871 is 17802152511.

It is not a de Polignac number, because 11525120871 - 2⁹ = 11525120359 is a prime.

It is a super-2 number, since 2×11525120871² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11525120801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9190060 + ... + 9191313.

It is an arithmetic number, because the mean of its divisors is an integer number (1102882440).

Almost surely, 2^11525120871 is an apocalyptic number.

11525120871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11525120871 is a deficient number, since it is larger than the sum of its proper divisors (6120998169).

11525120871 is a wasteful number, since it uses less digits than its factorization.

11525120871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18381406.

The product of its (nonzero) digits is 5600, while the sum is 33.

The spelling of 11525120871 in words is "eleven billion, five hundred twenty-five million, one hundred twenty thousand, eight hundred seventy-one".