121001020121 has 4 divisors (see below), whose sum is σ = 121003069200. Its totient is φ = 120998971044.

The previous prime is 121001020111. The next prime is 121001020171. The reversal of 121001020121 is 121020100121.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001020111) 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, 933251 + ... + 1054968.

It is an arithmetic number, because the mean of its divisors is an integer number (30250767300).

Almost surely, 2^121001020121 is an apocalyptic number.

It is an amenable number.

121001020121 is a deficient number, since it is larger than the sum of its proper divisors (2049079).

121001020121 is an equidigital number, since it uses as much as digits as its factorization.

121001020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049078.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121001020121 its reverse (121020100121), we get a palindrome (242021120242).

The spelling of 121001020121 in words is "one hundred twenty-one billion, one million, twenty thousand, one hundred twenty-one".