21241200043919 has 2 divisors, whose sum is σ = 21241200043920. Its totient is φ = 21241200043918.

The previous prime is 21241200043897. The next prime is 21241200043979. The reversal of 21241200043919 is 91934000214212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21241200043919 is a prime.

It is a super-2 number, since 2×21241200043919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241200043979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620600021959 + 10620600021960.

It is an arithmetic number, because the mean of its divisors is an integer number (10620600021960).

Almost surely, 2^{21241200043919} is an apocalyptic number.

21241200043919 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241200043919 is an equidigital number, since it uses as much as digits as its factorization.

21241200043919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 21241200043919 in words is "twenty-one trillion, two hundred forty-one billion, two hundred million, forty-three thousand, nine hundred nineteen".