1103121121 has 2 divisors, whose sum is σ = 1103121122. Its totient is φ = 1103121120.

The previous prime is 1103121119. The next prime is 1103121127. The reversal of 1103121121 is 1211213011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1066349025 + 36772096 = 32655^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103121121 - 2¹ = 1103121119 is a prime.

Together with 1103121119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1103121127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551560560 + 551560561.

It is an arithmetic number, because the mean of its divisors is an integer number (551560561).

Almost surely, 2^1103121121 is an apocalyptic number.

It is an amenable number.

1103121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103121121 is an equidigital number, since it uses as much as digits as its factorization.

1103121121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1103121121 is about 33213.2672436784. The cubic root of 1103121121 is about 1033.2555180968.

Adding to 1103121121 its reverse (1211213011), we get a palindrome (2314334132).

The spelling of 1103121121 in words is "one billion, one hundred three million, one hundred twenty-one thousand, one hundred twenty-one".