1122121121 has 8 divisors (see below), whose sum is σ = 1224509184. Its totient is φ = 1019795920.

The previous prime is 1122121111. The next prime is 1122121129. The reversal of 1122121121 is 1211212211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1122121121 - 2¹⁸ = 1121858977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122121096 and 1122121105.

It is not an unprimeable number, because it can be changed into a prime (1122121129) 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 7 ways as a sum of consecutive naturals, for example, 26576 + ... + 54318.

It is an arithmetic number, because the mean of its divisors is an integer number (153063648).

Almost surely, 2^1122121121 is an apocalyptic number.

1122121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122121121 is a deficient number, since it is larger than the sum of its proper divisors (102388063).

1122121121 is a wasteful number, since it uses less digits than its factorization.

1122121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31431.

The product of its digits is 16, while the sum is 14.

The square root of 1122121121 is about 33498.0763776071. The cubic root of 1122121121 is about 1039.1539967191.

Adding to 1122121121 its reverse (1211212211), we get a palindrome (2333333332).

The spelling of 1122121121 in words is "one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".