121221101201 has 4 divisors (see below), whose sum is σ = 122755545600. Its totient is φ = 119686656804.

The previous prime is 121221101179. The next prime is 121221101207. The reversal of 121221101201 is 102101122121.

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: 102101122121 = 29 ⋅3520728349.

It is a cyclic number.

It is not a de Polignac number, because 121221101201 - 2⁶ = 121221101137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121221101207) 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, 767222081 + ... + 767222238.

It is an arithmetic number, because the mean of its divisors is an integer number (30688886400).

Almost surely, 2^121221101201 is an apocalyptic number.

It is an amenable number.

121221101201 is a deficient number, since it is larger than the sum of its proper divisors (1534444399).

121221101201 is an equidigital number, since it uses as much as digits as its factorization.

121221101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534444398.

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

Adding to 121221101201 its reverse (102101122121), we get a palindrome (223322223322).

The spelling of 121221101201 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, two hundred one".