243150021355001 has 2 divisors, whose sum is σ = 243150021355002. Its totient is φ = 243150021355000.

The previous prime is 243150021354983. The next prime is 243150021355037. The reversal of 243150021355001 is 100553120051342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197340122928400 + 45809898426601 = 14047780^2 + 6768301^2 .

It is a cyclic number.

It is not a de Polignac number, because 243150021355001 - 2⁶ = 243150021354937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243150021855001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121575010677500 + 121575010677501.

It is an arithmetic number, because the mean of its divisors is an integer number (121575010677501).

Almost surely, 2^{243150021355001} is an apocalyptic number.

It is an amenable number.

243150021355001 is a deficient number, since it is larger than the sum of its proper divisors (1).

243150021355001 is an equidigital number, since it uses as much as digits as its factorization.

243150021355001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 243150021355001 in words is "two hundred forty-three trillion, one hundred fifty billion, twenty-one million, three hundred fifty-five thousand, one".