11203120131 has 32 divisors (see below), whose sum is σ = 17219186688. Its totient is φ = 6346473120.

The previous prime is 11203120067. The next prime is 11203120177. The reversal of 11203120131 is 13102130211.

It is a happy number.

It is not a de Polignac number, because 11203120131 - 2⁶ = 11203120067 is a prime.

It is a super-2 number, since 2×11203120131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11203120131.

It is not an unprimeable number, because it can be changed into a prime (11203120931) 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 31 ways as a sum of consecutive naturals, for example, 4474626 + ... + 4477128.

It is an arithmetic number, because the mean of its divisors is an integer number (538099584).

Almost surely, 2^11203120131 is an apocalyptic number.

11203120131 is a deficient number, since it is larger than the sum of its proper divisors (6016066557).

11203120131 is a wasteful number, since it uses less digits than its factorization.

11203120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11203120131 its reverse (13102130211), we get a palindrome (24305250342).

It can be divided in two parts, 1120 and 3120131, that added together give a triangular number (3121251 = T₂₄₉₈).

The spelling of 11203120131 in words is "eleven billion, two hundred three million, one hundred twenty thousand, one hundred thirty-one".