11121002131 has 4 divisors (see below), whose sum is σ = 11140479064. Its totient is φ = 11101525200.

The previous prime is 11121002111. The next prime is 11121002147. The reversal of 11121002131 is 13120012111.

It is a happy number.

11121002131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121002131 - 2¹⁹ = 11120477843 is a prime.

It is a super-2 number, since 2×11121002131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9737610 + ... + 9738751.

It is an arithmetic number, because the mean of its divisors is an integer number (2785119766).

Almost surely, 2^11121002131 is an apocalyptic number.

11121002131 is a deficient number, since it is larger than the sum of its proper divisors (19476933).

11121002131 is an equidigital number, since it uses as much as digits as its factorization.

11121002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19476932.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11121002131 its reverse (13120012111), we get a palindrome (24241014242).

The spelling of 11121002131 in words is "eleven billion, one hundred twenty-one million, two thousand, one hundred thirty-one".