121101011121 has 4 divisors (see below), whose sum is σ = 161468014832. Its totient is φ = 80734007412.

The previous prime is 121101011111. The next prime is 121101011177. The reversal of 121101011121 is 121110101121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121110101121 = 3 ⋅40370033707.

It is not a de Polignac number, because 121101011121 - 2¹⁰ = 121101010097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101011097 and 121101011106.

It is not an unprimeable number, because it can be changed into a prime (121101011111) 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 3 ways as a sum of consecutive naturals, for example, 20183501851 + ... + 20183501856.

It is an arithmetic number, because the mean of its divisors is an integer number (40367003708).

Almost surely, 2^121101011121 is an apocalyptic number.

It is an amenable number.

121101011121 is a deficient number, since it is larger than the sum of its proper divisors (40367003711).

121101011121 is an equidigital number, since it uses as much as digits as its factorization.

121101011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367003710.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121101011121 its reverse (121110101121), we get a palindrome (242211112242).

The spelling of 121101011121 in words is "one hundred twenty-one billion, one hundred one million, eleven thousand, one hundred twenty-one".