1123121112 has 32 divisors (see below), whose sum is σ = 2828011200. Its totient is φ = 371679264.

The previous prime is 1123121107. The next prime is 1123121123. The reversal of 1123121112 is 2111213211.

It is a super-2 number, since 2×1123121112² = 2522802064440233088, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1123121091 and 1123121100.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 164998 + ... + 171669.

It is an arithmetic number, because the mean of its divisors is an integer number (88375350).

Almost surely, 2^1123121112 is an apocalyptic number.

1123121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1123121112 is an abundant number, since it is smaller than the sum of its proper divisors (1704890088).

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

1123121112 is a wasteful number, since it uses less digits than its factorization.

1123121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336815 (or 336811 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 1123121112 is about 33512.9991495837. Note that the first 3 decimals coincide. The cubic root of 1123121112 is about 1039.4625897031.

Adding to 1123121112 its reverse (2111213211), we get a palindrome (3234334323).

The spelling of 1123121112 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred twelve".