11209012331 has 16 divisors (see below), whose sum is σ = 12315771360. Its totient is φ = 10116986880.

The previous prime is 11209012327. The next prime is 11209012393. The reversal of 11209012331 is 13321090211.

It is not a de Polignac number, because 11209012331 - 2² = 11209012327 is a prime.

It is a super-2 number, since 2×11209012331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11209012297 and 11209012306.

It is not an unprimeable number, because it can be changed into a prime (11209012301) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3571595 + ... + 3574731.

It is an arithmetic number, because the mean of its divisors is an integer number (769735710).

Almost surely, 2^11209012331 is an apocalyptic number.

11209012331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11209012331 is a deficient number, since it is larger than the sum of its proper divisors (1106759029).

11209012331 is a wasteful number, since it uses less digits than its factorization.

11209012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374.

The product of its (nonzero) digits is 324, while the sum is 23.

It can be divided in two parts, 112090 and 12331, that added together give a palindrome (124421).

The spelling of 11209012331 in words is "eleven billion, two hundred nine million, twelve thousand, three hundred thirty-one".