1121121121 has 12 divisors (see below), whose sum is σ = 1164091500. Its totient is φ = 1079687168.

The previous prime is 1121121103. The next prime is 1121121263. The reversal of 1121121121 is 1211211211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 81703521 + 1039417600 = 9039^2 + 32240^2 .

It is not a de Polignac number, because 1121121121 - 2¹⁷ = 1120990049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121151121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376125 + ... + 379093.

It is an arithmetic number, because the mean of its divisors is an integer number (97007625).

Almost surely, 2^1121121121 is an apocalyptic number.

It is an amenable number.

1121121121 is a deficient number, since it is larger than the sum of its proper divisors (42970379).

1121121121 is an equidigital number, since it uses as much as digits as its factorization.

1121121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476 (or 3447 counting only the distinct ones).

The product of its digits is 8, while the sum is 13.

The square root of 1121121121 is about 33483.1468204528. The cubic root of 1121121121 is about 1038.8452175634.

Adding to 1121121121 its reverse (1211211211), we get a palindrome (2332332332).

The spelling of 1121121121 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".