21241033019 has 2 divisors, whose sum is σ = 21241033020. Its totient is φ = 21241033018.

The previous prime is 21241032997. The next prime is 21241033049. The reversal of 21241033019 is 91033014212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241033019 - 2⁸ = 21241032763 is a prime.

It is a super-2 number, since 2×21241033019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21241033049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620516509 + 10620516510.

It is an arithmetic number, because the mean of its divisors is an integer number (10620516510).

Almost surely, 2^21241033019 is an apocalyptic number.

21241033019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241033019 is an equidigital number, since it uses as much as digits as its factorization.

21241033019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21241033019 in words is "twenty-one billion, two hundred forty-one million, thirty-three thousand, nineteen".