1121111120 has 80 divisors (see below), whose sum is σ = 2690184960. Its totient is φ = 434284032.

The previous prime is 1121111119. The next prime is 1121111161. The reversal of 1121111120 is 211111211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333287 + ... + 336633.

It is an arithmetic number, because the mean of its divisors is an integer number (33627312).

Almost surely, 2^1121111120 is an apocalyptic number.

1121111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345092480).

1121111120 is an abundant number, since it is smaller than the sum of its proper divisors (1569073840).

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

1121111120 is a wasteful number, since it uses less digits than its factorization.

1121111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1121111120 is about 33482.9974763312. The cubic root of 1121111120 is about 1038.8421285359.

Adding to 1121111120 its reverse (211111211), we get a palindrome (1332222331).

Subtracting from 1121111120 its reverse (211111211), we obtain a palindrome (909999909).

It can be divided in two parts, 1 and 121111120, that added together give a palindrome (121111121).

The spelling of 1121111120 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty".