241921947991819 has 2 divisors, whose sum is σ = 241921947991820. Its totient is φ = 241921947991818.

The previous prime is 241921947991817. The next prime is 241921947991951. The reversal of 241921947991819 is 918199749129142.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 241921947991819 - 2¹ = 241921947991817 is a prime.

It is a super-2 number, since 2×241921947991819² (a number of 30 digits) contains 22 as substring.

Together with 241921947991817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (241921947991811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120960973995909 + 120960973995910.

It is an arithmetic number, because the mean of its divisors is an integer number (120960973995910).

Almost surely, 2^{241921947991819} is an apocalyptic number.

241921947991819 is a deficient number, since it is larger than the sum of its proper divisors (1).

241921947991819 is an equidigital number, since it uses as much as digits as its factorization.

241921947991819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211631616, while the sum is 76.

The spelling of 241921947991819 in words is "two hundred forty-one trillion, nine hundred twenty-one billion, nine hundred forty-seven million, nine hundred ninety-one thousand, eight hundred nineteen".