21002012200212 has 24 divisors (see below), whose sum is σ = 49004890200000. Its totient is φ = 7000642866816.

The previous prime is 21002012200193. The next prime is 21002012200217. The reversal of 21002012200212 is 21200221020012.

It is a junction number, because it is equal to n+sod(n) for n = 21002012200191 and 21002012200200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002012200217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220837 + ... + 6484812.

It is an arithmetic number, because the mean of its divisors is an integer number (2041870425000).

Almost surely, 2^{21002012200212} is an apocalyptic number.

It is an amenable number.

21002012200212 is an abundant number, since it is smaller than the sum of its proper divisors (28002877999788).

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

21002012200212 is a wasteful number, since it uses less digits than its factorization.

21002012200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966655 (or 6966653 counting only the distinct ones).

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

Adding to 21002012200212 its reverse (21200221020012), we get a palindrome (42202233220224).

The spelling of 21002012200212 in words is "twenty-one trillion, two billion, twelve million, two hundred thousand, two hundred twelve".