121001120221 has 4 divisors (see below), whose sum is σ = 121053800412. Its totient is φ = 120948440032.

The previous prime is 121001120203. The next prime is 121001120291. The reversal of 121001120221 is 122021100121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122021100121 = 8353 ⋅14608057.

It can be written as a sum of positive squares in 2 ways, for example, as 28348456900 + 92652663321 = 168370^2 + 304389^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001120221 - 2¹⁷ = 121000989149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001120291) 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, 26336650 + ... + 26341243.

It is an arithmetic number, because the mean of its divisors is an integer number (30263450103).

Almost surely, 2^121001120221 is an apocalyptic number.

It is an amenable number.

121001120221 is a deficient number, since it is larger than the sum of its proper divisors (52680191).

121001120221 is an equidigital number, since it uses as much as digits as its factorization.

121001120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52680190.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121001120221 its reverse (122021100121), we get a palindrome (243022220342).

The spelling of 121001120221 in words is "one hundred twenty-one billion, one million, one hundred twenty thousand, two hundred twenty-one".