21124221179 has 2 divisors, whose sum is σ = 21124221180. Its totient is φ = 21124221178.

The previous prime is 21124221169. The next prime is 21124221271. The reversal of 21124221179 is 97112242112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21124221179 - 2¹⁶ = 21124155643 is a prime.

It is a super-3 number, since 3×21124221179³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21124221169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562110589 + 10562110590.

It is an arithmetic number, because the mean of its divisors is an integer number (10562110590).

Almost surely, 2^21124221179 is an apocalyptic number.

21124221179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124221179 is an equidigital number, since it uses as much as digits as its factorization.

21124221179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The spelling of 21124221179 in words is "twenty-one billion, one hundred twenty-four million, two hundred twenty-one thousand, one hundred seventy-nine".