11121431331 has 16 divisors (see below), whose sum is σ = 15997090464. Its totient is φ = 6846488064.

The previous prime is 11121431323. The next prime is 11121431333. The reversal of 11121431331 is 13313412111.

11121431331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11121431331 - 2³ = 11121431323 is a prime.

It is a super-2 number, since 2×11121431331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11121431298 and 11121431307.

It is not an unprimeable number, because it can be changed into a prime (11121431333) 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 15 ways as a sum of consecutive naturals, for example, 2054536 + ... + 2059941.

It is an arithmetic number, because the mean of its divisors is an integer number (999818154).

Almost surely, 2^11121431331 is an apocalyptic number.

11121431331 is a deficient number, since it is larger than the sum of its proper divisors (4875659133).

11121431331 is a wasteful number, since it uses less digits than its factorization.

11121431331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114550.

The product of its digits is 216, while the sum is 21.

Adding to 11121431331 its reverse (13313412111), we get a palindrome (24434843442).

The spelling of 11121431331 in words is "eleven billion, one hundred twenty-one million, four hundred thirty-one thousand, three hundred thirty-one".