121011121 has 16 divisors (see below), whose sum is σ = 151383168. Its totient is φ = 93974400.

The previous prime is 121011109. The next prime is 121011181. The reversal of 121011121 is 121110121.

It is a cyclic number.

It is not a de Polignac number, because 121011121 - 2¹¹ = 121009073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011098 and 121011107.

It is not an unprimeable number, because it can be changed into a prime (121011101) 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 15 ways as a sum of consecutive naturals, for example, 21591 + ... + 26611.

It is an arithmetic number, because the mean of its divisors is an integer number (9461448).

Almost surely, 2^121011121 is an apocalyptic number.

121011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121011121 is a deficient number, since it is larger than the sum of its proper divisors (30372047).

121011121 is a wasteful number, since it uses less digits than its factorization.

121011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 121011121 is about 11000.5054883855. The cubic root of 121011121 is about 494.6238968740.

Adding to 121011121 its reverse (121110121), we get a palindrome (242121242).

The spelling of 121011121 in words is "one hundred twenty-one million, eleven thousand, one hundred twenty-one".