1121003121 has 32 divisors (see below), whose sum is σ = 1771872256. Its totient is φ = 616896000.

The previous prime is 1121003113. The next prime is 1121003123. The reversal of 1121003121 is 1213001211.

It is not a de Polignac number, because 1121003121 - 2³ = 1121003113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121003097 and 1121003106.

It is not an unprimeable number, because it can be changed into a prime (1121003123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133281 + ... + 141441.

It is an arithmetic number, because the mean of its divisors is an integer number (55371008).

Almost surely, 2^1121003121 is an apocalyptic number.

It is an amenable number.

1121003121 is a deficient number, since it is larger than the sum of its proper divisors (650869135).

1121003121 is a wasteful number, since it uses less digits than its factorization.

1121003121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8413.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1121003121 is about 33481.3846935876. The cubic root of 1121003121 is about 1038.8087695132.

Adding to 1121003121 its reverse (1213001211), we get a palindrome (2334004332).

The spelling of 1121003121 in words is "one billion, one hundred twenty-one million, three thousand, one hundred twenty-one".