21171329836602 has 16 divisors (see below), whose sum is σ = 46191992370912. Its totient is φ = 6415554495920.

The previous prime is 21171329836543. The next prime is 21171329836603. The reversal of 21171329836602 is 20663892317112.

It is not an unprimeable number, because it can be changed into a prime (21171329836603) 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 7 ways as a sum of consecutive naturals, for example, 160388862333 + ... + 160388862464.

It is an arithmetic number, because the mean of its divisors is an integer number (2886999523182).

Almost surely, 2^{21171329836602} is an apocalyptic number.

21171329836602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21171329836602 is an abundant number, since it is smaller than the sum of its proper divisors (25020662534310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21171329836602 is a wasteful number, since it uses less digits than its factorization.

21171329836602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320777724813.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 21171329836602 in words is "twenty-one trillion, one hundred seventy-one billion, three hundred twenty-nine million, eight hundred thirty-six thousand, six hundred two".