21034230979 has 2 divisors, whose sum is σ = 21034230980. Its totient is φ = 21034230978.

The previous prime is 21034230941. The next prime is 21034231003. The reversal of 21034230979 is 97903243012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21034230979 - 2⁷ = 21034230851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21034230179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517115489 + 10517115490.

It is an arithmetic number, because the mean of its divisors is an integer number (10517115490).

Almost surely, 2^21034230979 is an apocalyptic number.

21034230979 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034230979 is an equidigital number, since it uses as much as digits as its factorization.

21034230979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 21034230979 in words is "twenty-one billion, thirty-four million, two hundred thirty thousand, nine hundred seventy-nine".