11131202420 has 96 divisors (see below), whose sum is σ = 25405664256. Its totient is φ = 4072320000.

The previous prime is 11131202419. The next prime is 11131202431. The reversal of 11131202420 is 2420213111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18337757 + ... + 18338363.

It is an arithmetic number, because the mean of its divisors is an integer number (264642336).

Almost surely, 2^11131202420 is an apocalyptic number.

11131202420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11131202420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12702832128).

11131202420 is an abundant number, since it is smaller than the sum of its proper divisors (14274461836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131202420 is a wasteful number, since it uses less digits than its factorization.

11131202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11131202420 its reverse (2420213111), we get a palindrome (13551415531).

The spelling of 11131202420 in words is "eleven billion, one hundred thirty-one million, two hundred two thousand, four hundred twenty".