121221402341 has 4 divisors (see below), whose sum is σ = 130546125612. Its totient is φ = 111896679072.

The previous prime is 121221402293. The next prime is 121221402343. The reversal of 121221402341 is 143204122121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 143204122121 = 19 ⋅7537059059.

It can be written as a sum of positive squares in 2 ways, for example, as 37539062500 + 83682339841 = 193750^2 + 289279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221402341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221402343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4662361616 + ... + 4662361641.

It is an arithmetic number, because the mean of its divisors is an integer number (32636531403).

Almost surely, 2^121221402341 is an apocalyptic number.

It is an amenable number.

121221402341 is a deficient number, since it is larger than the sum of its proper divisors (9324723271).

121221402341 is an equidigital number, since it uses as much as digits as its factorization.

121221402341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324723270.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121221402341 its reverse (143204122121), we get a palindrome (264425524462).

The spelling of 121221402341 in words is "one hundred twenty-one billion, two hundred twenty-one million, four hundred two thousand, three hundred forty-one".