21124530013079 has 2 divisors, whose sum is σ = 21124530013080. Its totient is φ = 21124530013078.

The previous prime is 21124530013007. The next prime is 21124530013117. The reversal of 21124530013079 is 97031003542112.

It is an a-pointer prime, because the next prime (21124530013117) can be obtained adding 21124530013079 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21124530013079 - 2²⁰ = 21124528964503 is a prime.

It is a super-2 number, since 2×21124530013079² (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 (21124530010079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562265006539 + 10562265006540.

It is an arithmetic number, because the mean of its divisors is an integer number (10562265006540).

Almost surely, 2^{21124530013079} is an apocalyptic number.

21124530013079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124530013079 is an equidigital number, since it uses as much as digits as its factorization.

21124530013079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 21124530013079 in words is "twenty-one trillion, one hundred twenty-four billion, five hundred thirty million, thirteen thousand, seventy-nine".