242121033991 has 2 divisors, whose sum is σ = 242121033992. Its totient is φ = 242121033990.

The previous prime is 242121033983. The next prime is 242121034013. The reversal of 242121033991 is 199330121242.

242121033991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242121033991 - 2³ = 242121033983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242121033991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242121043991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060516995 + 121060516996.

It is an arithmetic number, because the mean of its divisors is an integer number (121060516996).

Almost surely, 2^242121033991 is an apocalyptic number.

242121033991 is a deficient number, since it is larger than the sum of its proper divisors (1).

242121033991 is an equidigital number, since it uses as much as digits as its factorization.

242121033991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 242121033991 in words is "two hundred forty-two billion, one hundred twenty-one million, thirty-three thousand, nine hundred ninety-one".