1123121012 has 24 divisors (see below), whose sum is σ = 2135393736. Its totient is φ = 513773568.

The previous prime is 1123121011. The next prime is 1123121063. The reversal of 1123121012 is 2101213211.

It can be written as a sum of positive squares in 4 ways, for example, as 60621796 + 1062499216 = 7786^2 + 32596^2 .

It is a super-2 number, since 2×1123121012² = 2522801615191808288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123121011) by changing a digit.

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, 89693 + ... + 101444.

It is an arithmetic number, because the mean of its divisors is an integer number (88974739).

Almost surely, 2^1123121012 is an apocalyptic number.

It is an amenable number.

1123121012 is a deficient number, since it is larger than the sum of its proper divisors (1012272724).

1123121012 is a wasteful number, since it uses less digits than its factorization.

1123121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191267 (or 191265 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1123121012 is about 33512.9976576253. The cubic root of 1123121012 is about 1039.4625588527.

Adding to 1123121012 its reverse (2101213211), we get a palindrome (3224334223).

The spelling of 1123121012 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, twelve".