11520203129 has 4 divisors (see below), whose sum is σ = 11709058980. Its totient is φ = 11331347280.

The previous prime is 11520203069. The next prime is 11520203141. The reversal of 11520203129 is 92130202511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92130202511 = 75683 ⋅1217317.

It can be written as a sum of positive squares in 2 ways, for example, as 6703843129 + 4816360000 = 81877^2 + 69400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11520203129 - 2¹⁶ = 11520137593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11520203098 and 11520203107.

It is not an unprimeable number, because it can be changed into a prime (11520203029) 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, 94427834 + ... + 94427955.

It is an arithmetic number, because the mean of its divisors is an integer number (2927264745).

Almost surely, 2^11520203129 is an apocalyptic number.

It is an amenable number.

11520203129 is a deficient number, since it is larger than the sum of its proper divisors (188855851).

11520203129 is an equidigital number, since it uses as much as digits as its factorization.

11520203129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188855850.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 11520203129 in words is "eleven billion, five hundred twenty million, two hundred three thousand, one hundred twenty-nine".