243121241401 has 2 divisors, whose sum is σ = 243121241402. Its totient is φ = 243121241400.

The previous prime is 243121241383. The next prime is 243121241477. The reversal of 243121241401 is 104142121342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234981593001 + 8139648400 = 484749^2 + 90220^2 .

It is a cyclic number.

It is not a de Polignac number, because 243121241401 - 2⁵ = 243121241369 is a prime.

It is not a weakly prime, because it can be changed into another prime (243121241491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560620700 + 121560620701.

It is an arithmetic number, because the mean of its divisors is an integer number (121560620701).

Almost surely, 2^243121241401 is an apocalyptic number.

It is an amenable number.

243121241401 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121241401 is an equidigital number, since it uses as much as digits as its factorization.

243121241401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 243121241401 its reverse (104142121342), we get a palindrome (347263362743).

The spelling of 243121241401 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, four hundred one".