121110112121 has 16 divisors (see below), whose sum is σ = 123010472448. Its totient is φ = 119224944000.

The previous prime is 121110112111. The next prime is 121110112181. The reversal of 121110112121 is 121211011121.

It is a cyclic number.

It is not a de Polignac number, because 121110112121 - 2¹⁴ = 121110095737 is a prime.

It is a super-2 number, since 2×121110112121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110112096 and 121110112105.

It is not an unprimeable number, because it can be changed into a prime (121110112111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19782941 + ... + 19789061.

It is an arithmetic number, because the mean of its divisors is an integer number (7688154528).

Almost surely, 2^121110112121 is an apocalyptic number.

It is an amenable number.

121110112121 is a deficient number, since it is larger than the sum of its proper divisors (1900360327).

121110112121 is a wasteful number, since it uses less digits than its factorization.

121110112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121110112121 its reverse (121211011121), we get a palindrome (242321123242).

The spelling of 121110112121 in words is "one hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, one hundred twenty-one".