21010020200012 has 24 divisors (see below), whose sum is σ = 36797903071440. Its totient is φ = 10496336880960.

The previous prime is 21010020199999. The next prime is 21010020200101. The reversal of 21010020200012 is 21000202001012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010020199966 and 21010020200002.

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 7 ways as a sum of consecutive naturals, for example, 25440314 + ... + 26253182.

It is an arithmetic number, because the mean of its divisors is an integer number (1533245961310).

Almost surely, 2^{21010020200012} is an apocalyptic number.

It is an amenable number.

21010020200012 is a deficient number, since it is larger than the sum of its proper divisors (15787882871428).

21010020200012 is a wasteful number, since it uses less digits than its factorization.

21010020200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818201 (or 818199 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21010020200012 its reverse (21000202001012), we get a palindrome (42010222201024).

The spelling of 21010020200012 in words is "twenty-one trillion, ten billion, twenty million, two hundred thousand, twelve".