1111121144 has 16 divisors (see below), whose sum is σ = 2380974000. Its totient is φ = 476194752.

The previous prime is 1111121119. The next prime is 1111121149. The reversal of 1111121144 is 4411211111.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920669 + ... + 9920780.

It is an arithmetic number, because the mean of its divisors is an integer number (148810875).

Almost surely, 2^1111121144 is an apocalyptic number.

1111121144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1111121144 is an abundant number, since it is smaller than the sum of its proper divisors (1269852856).

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

1111121144 is a wasteful number, since it uses less digits than its factorization.

1111121144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19841462 (or 19841458 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

The square root of 1111121144 is about 33333.4838263269. The cubic root of 1111121144 is about 1035.7472860938.

Adding to 1111121144 its reverse (4411211111), we get a palindrome (5522332255).

The spelling of 1111121144 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred forty-four".