242021320209919 has 2 divisors, whose sum is σ = 242021320209920. Its totient is φ = 242021320209918.

The previous prime is 242021320209913. The next prime is 242021320209959. The reversal of 242021320209919 is 919902023120242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242021320209919 - 2¹¹ = 242021320207871 is a prime.

It is a super-2 number, since 2×242021320209919² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242021320209913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121010660104959 + 121010660104960.

It is an arithmetic number, because the mean of its divisors is an integer number (121010660104960).

Almost surely, 2^{242021320209919} is an apocalyptic number.

242021320209919 is a deficient number, since it is larger than the sum of its proper divisors (1).

242021320209919 is an equidigital number, since it uses as much as digits as its factorization.

242021320209919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 242021320209919 in words is "two hundred forty-two trillion, twenty-one billion, three hundred twenty million, two hundred nine thousand, nine hundred nineteen".