11231311144 has 32 divisors (see below), whose sum is σ = 21246408000. Its totient is φ = 5565772800.

The previous prime is 11231311111. The next prime is 11231311153. The reversal of 11231311144 is 44111313211.

It is a super-2 number, since 2×11231311144² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532039 + ... + 552745.

It is an arithmetic number, because the mean of its divisors is an integer number (663950250).

Almost surely, 2^11231311144 is an apocalyptic number.

It is an amenable number.

11231311144 is a deficient number, since it is larger than the sum of its proper divisors (10015096856).

11231311144 is a wasteful number, since it uses less digits than its factorization.

11231311144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21313 (or 21309 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 11231311144 its reverse (44111313211), we get a palindrome (55342624355).

The spelling of 11231311144 in words is "eleven billion, two hundred thirty-one million, three hundred eleven thousand, one hundred forty-four".