21079799229 has 16 divisors (see below), whose sum is σ = 28636103232. Its totient is φ = 13790302848.

The previous prime is 21079799201. The next prime is 21079799243. The reversal of 21079799229 is 92299797012.

It is not a de Polignac number, because 21079799229 - 2¹³ = 21079791037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21079099229) 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 in 15 ways as a sum of consecutive naturals, for example, 201159 + ... + 287444.

It is an arithmetic number, because the mean of its divisors is an integer number (1789756452).

Almost surely, 2^21079799229 is an apocalyptic number.

It is an amenable number.

21079799229 is a deficient number, since it is larger than the sum of its proper divisors (7556304003).

21079799229 is a wasteful number, since it uses less digits than its factorization.

21079799229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488876.

The product of its (nonzero) digits is 2571912, while the sum is 57.

The spelling of 21079799229 in words is "twenty-one billion, seventy-nine million, seven hundred ninety-nine thousand, two hundred twenty-nine".