21243000241019 has 2 divisors, whose sum is σ = 21243000241020. Its totient is φ = 21243000241018.

The previous prime is 21243000240989. The next prime is 21243000241033. The reversal of 21243000241019 is 91014200034212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21243000241019 - 2¹² = 21243000236923 is a prime.

It is a super-2 number, since 2×21243000241019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21243000240982 and 21243000241000.

It is not a weakly prime, because it can be changed into another prime (21243000241049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621500120509 + 10621500120510.

It is an arithmetic number, because the mean of its divisors is an integer number (10621500120510).

Almost surely, 2^{21243000241019} is an apocalyptic number.

21243000241019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21243000241019 is an equidigital number, since it uses as much as digits as its factorization.

21243000241019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 21243000241019 in words is "twenty-one trillion, two hundred forty-three billion, two hundred forty-one thousand, nineteen".