21241200043979 has 2 divisors, whose sum is σ = 21241200043980. Its totient is φ = 21241200043978.

The previous prime is 21241200043919. The next prime is 21241200044087. The reversal of 21241200043979 is 97934000214212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241200043979 - 2²⁴ = 21241183266763 is a prime.

It is not a weakly prime, because it can be changed into another prime (21241200043919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620600021989 + 10620600021990.

It is an arithmetic number, because the mean of its divisors is an integer number (10620600021990).

Almost surely, 2^{21241200043979} is an apocalyptic number.

21241200043979 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241200043979 is an equidigital number, since it uses as much as digits as its factorization.

21241200043979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 21241200043979 in words is "twenty-one trillion, two hundred forty-one billion, two hundred million, forty-three thousand, nine hundred seventy-nine".