21242515050202 has 16 divisors (see below), whose sum is σ = 31894445468160. Its totient is φ = 10611037771488.

The previous prime is 21242515050187. The next prime is 21242515050313. The reversal of 21242515050202 is 20205051524212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8234518 + ... + 10502014.

It is an arithmetic number, because the mean of its divisors is an integer number (1993402841760).

Almost surely, 2^{21242515050202} is an apocalyptic number.

21242515050202 is a deficient number, since it is larger than the sum of its proper divisors (10651930417958).

21242515050202 is a wasteful number, since it uses less digits than its factorization.

21242515050202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272005.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 21242515050202 its reverse (20205051524212), we get a palindrome (41447566574414).

The spelling of 21242515050202 in words is "twenty-one trillion, two hundred forty-two billion, five hundred fifteen million, fifty thousand, two hundred two".