121020211121 has 8 divisors (see below), whose sum is σ = 123086444640. Its totient is φ = 118954479168.

The previous prime is 121020211111. The next prime is 121020211157. The reversal of 121020211121 is 121112020121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121020211121 - 2⁶ = 121020211057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121020211096 and 121020211105.

It is not an unprimeable number, because it can be changed into a prime (121020211111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378425 + ... + 620681.

It is an arithmetic number, because the mean of its divisors is an integer number (15385805580).

Almost surely, 2^121020211121 is an apocalyptic number.

It is an amenable number.

121020211121 is a deficient number, since it is larger than the sum of its proper divisors (2066233519).

121020211121 is an equidigital number, since it uses as much as digits as its factorization.

121020211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250783.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121020211121 its reverse (121112020121), we get a palindrome (242132231242).

The spelling of 121020211121 in words is "one hundred twenty-one billion, twenty million, two hundred eleven thousand, one hundred twenty-one".