21210010011002 has 8 divisors (see below), whose sum is σ = 33686486488116. Its totient is φ = 9981181181632.

The previous prime is 21210010010993. The next prime is 21210010011017. The reversal of 21210010011002 is 20011001001212.

It can be written as a sum of positive squares in 2 ways, for example, as 21199845540241 + 10164470761 = 4604329^2 + 100819^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21210010011002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311911911893 + ... + 311911911960.

Almost surely, 2^{21210010011002} is an apocalyptic number.

21210010011002 is a deficient number, since it is larger than the sum of its proper divisors (12476476477114).

21210010011002 is a wasteful number, since it uses less digits than its factorization.

21210010011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623823823872.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210010011002 its reverse (20011001001212), we get a palindrome (41221011012214).

The spelling of 21210010011002 in words is "twenty-one trillion, two hundred ten billion, ten million, eleven thousand, two".