243421100101 has 2 divisors, whose sum is σ = 243421100102. Its totient is φ = 243421100100.

The previous prime is 243421100023. The next prime is 243421100113. The reversal of 243421100101 is 101001124342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241448407876 + 1972692225 = 491374^2 + 44415^2 .

It is a cyclic number.

It is not a de Polignac number, because 243421100101 - 2²⁷ = 243286882373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243421100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710550050 + 121710550051.

It is an arithmetic number, because the mean of its divisors is an integer number (121710550051).

Almost surely, 2^243421100101 is an apocalyptic number.

It is an amenable number.

243421100101 is a deficient number, since it is larger than the sum of its proper divisors (1).

243421100101 is an equidigital number, since it uses as much as digits as its factorization.

243421100101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 243421100101 its reverse (101001124342), we get a palindrome (344422224443).

The spelling of 243421100101 in words is "two hundred forty-three billion, four hundred twenty-one million, one hundred thousand, one hundred one".