121011120121 has 4 divisors (see below), whose sum is σ = 122668806772. Its totient is φ = 119353433472.

The previous prime is 121011120091. The next prime is 121011120143. The reversal of 121011120121 is 121021110121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121021110121 = 1093 ⋅110723797.

It can be written as a sum of positive squares in 2 ways, for example, as 42156302400 + 78854817721 = 205320^2 + 280811^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011120121 - 2⁹ = 121011119609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011120161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828843216 + ... + 828843361.

It is an arithmetic number, because the mean of its divisors is an integer number (30667201693).

Almost surely, 2^121011120121 is an apocalyptic number.

It is an amenable number.

121011120121 is a deficient number, since it is larger than the sum of its proper divisors (1657686651).

121011120121 is an equidigital number, since it uses as much as digits as its factorization.

121011120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657686650.

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

Adding to 121011120121 its reverse (121021110121), we get a palindrome (242032230242).

The spelling of 121011120121 in words is "one hundred twenty-one billion, eleven million, one hundred twenty thousand, one hundred twenty-one".