21102202020012 has 24 divisors (see below), whose sum is σ = 49345279356912. Its totient is φ = 7018809057600.

The previous prime is 21102202020007. The next prime is 21102202020047. The reversal of 21102202020012 is 21002020220112.

It is a junction number, because it is equal to n+sod(n) for n = 21102202019973 and 21102202020000.

It is an unprimeable number.

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, 1907279539 + ... + 1907290602.

It is an arithmetic number, because the mean of its divisors is an integer number (2056053306538).

Almost surely, 2^{21102202020012} is an apocalyptic number.

It is an amenable number.

21102202020012 is an abundant number, since it is smaller than the sum of its proper divisors (28243077336900).

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

21102202020012 is a wasteful number, since it uses less digits than its factorization.

21102202020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814570609 (or 3814570607 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21102202020012 its reverse (21002020220112), we get a palindrome (42104222240124).

The spelling of 21102202020012 in words is "twenty-one trillion, one hundred two billion, two hundred two million, twenty thousand, twelve".