21210100011002 has 12 divisors (see below), whose sum is σ = 37009460223450. Its totient is φ = 9090042861816.

The previous prime is 21210100010989. The next prime is 21210100011011. The reversal of 21210100011002 is 20011000101212.

It can be written as a sum of positive squares in only one way, i.e., 13021625885401 + 8188474125601 = 3608549^2 + 2861551^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108214795877 + ... + 108214796072.

Almost surely, 2^{21210100011002} is an apocalyptic number.

21210100011002 is a deficient number, since it is larger than the sum of its proper divisors (15799360212448).

21210100011002 is a wasteful number, since it uses less digits than its factorization.

21210100011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216429591965 (or 216429591958 counting only the distinct ones).

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

Adding to 21210100011002 its reverse (20011000101212), we get a palindrome (41221100112214).

The spelling of 21210100011002 in words is "twenty-one trillion, two hundred ten billion, one hundred million, eleven thousand, two".