21202002100212 has 24 divisors (see below), whose sum is σ = 50621834473056. Its totient is φ = 6902977427808.

The previous prime is 21202002100207. The next prime is 21202002100219. The reversal of 21202002100212 is 21200120020212.

It is a junction number, because it is equal to n+sod(n) for n = 21202002100191 and 21202002100200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202002100219) 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, 20544575163 + ... + 20544576194.

It is an arithmetic number, because the mean of its divisors is an integer number (2109243103044).

Almost surely, 2^{21202002100212} is an apocalyptic number.

It is an amenable number.

21202002100212 is an abundant number, since it is smaller than the sum of its proper divisors (29419832372844).

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

21202002100212 is a wasteful number, since it uses less digits than its factorization.

21202002100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41089151407 (or 41089151405 counting only the distinct ones).

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

Adding to 21202002100212 its reverse (21200120020212), we get a palindrome (42402122120424).

The spelling of 21202002100212 in words is "twenty-one trillion, two hundred two billion, two million, one hundred thousand, two hundred twelve".