121421042201 has 4 divisors (see below), whose sum is σ = 121454952804. Its totient is φ = 121387131600.

The previous prime is 121421042189. The next prime is 121421042219. The reversal of 121421042201 is 102240124121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102240124121 = 177091 ⋅577331.

It can be written as a sum of positive squares in 2 ways, for example, as 96842328025 + 24578714176 = 311195^2 + 156776^2 .

It is a cyclic number.

It is not a de Polignac number, because 121421042201 - 2¹⁰ = 121421041177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121421042261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16949930 + ... + 16957091.

It is an arithmetic number, because the mean of its divisors is an integer number (30363738201).

Almost surely, 2^121421042201 is an apocalyptic number.

It is an amenable number.

121421042201 is a deficient number, since it is larger than the sum of its proper divisors (33910603).

121421042201 is an equidigital number, since it uses as much as digits as its factorization.

121421042201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33910602.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121421042201 its reverse (102240124121), we get a palindrome (223661166322).

The spelling of 121421042201 in words is "one hundred twenty-one billion, four hundred twenty-one million, forty-two thousand, two hundred one".