121001224121 has 4 divisors (see below), whose sum is σ = 121002221952. Its totient is φ = 121000226292.

The previous prime is 121001224081. The next prime is 121001224133. The reversal of 121001224121 is 121422100121.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121422100121 = 7 ⋅17346014303.

It is a cyclic number.

It is not a de Polignac number, because 121001224121 - 2¹⁴ = 121001207737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121001224121.

It is not an unprimeable number, because it can be changed into a prime (121001224171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287021 + ... + 569546.

It is an arithmetic number, because the mean of its divisors is an integer number (30250555488).

Almost surely, 2^121001224121 is an apocalyptic number.

It is an amenable number.

121001224121 is a deficient number, since it is larger than the sum of its proper divisors (997831).

121001224121 is an equidigital number, since it uses as much as digits as its factorization.

121001224121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997830.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121001224121 its reverse (121422100121), we get a palindrome (242423324242).

The spelling of 121001224121 in words is "one hundred twenty-one billion, one million, two hundred twenty-four thousand, one hundred twenty-one".