243102021241 has 2 divisors, whose sum is σ = 243102021242. Its totient is φ = 243102021240.

The previous prime is 243102021223. The next prime is 243102021287. The reversal of 243102021241 is 142120201342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175061907216 + 68040114025 = 418404^2 + 260845^2 .

It is a cyclic number.

It is not a de Polignac number, because 243102021241 - 2²⁷ = 242967803513 is a prime.

It is not a weakly prime, because it can be changed into another prime (243102021221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121551010620 + 121551010621.

It is an arithmetic number, because the mean of its divisors is an integer number (121551010621).

Almost surely, 2^243102021241 is an apocalyptic number.

It is an amenable number.

243102021241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243102021241 is an equidigital number, since it uses as much as digits as its factorization.

243102021241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 243102021241 its reverse (142120201342), we get a palindrome (385222222583).

The spelling of 243102021241 in words is "two hundred forty-three billion, one hundred two million, twenty-one thousand, two hundred forty-one".