20002121110002 has 16 divisors (see below), whose sum is σ = 41383698848640. Its totient is φ = 6437464265232.

The previous prime is 20002121110001. The next prime is 20002121110019. The reversal of 20002121110002 is 20001112120002.

It is a self number, because there is not a number n which added to its sum of digits gives 20002121110002.

It is not an unprimeable number, because it can be changed into a prime (20002121110001) 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, 57477359338 + ... + 57477359685.

It is an arithmetic number, because the mean of its divisors is an integer number (2586481178040).

Almost surely, 2^{20002121110002} is an apocalyptic number.

20002121110002 is an abundant number, since it is smaller than the sum of its proper divisors (21381577738638).

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

20002121110002 is a wasteful number, since it uses less digits than its factorization.

20002121110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114954719057.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20002121110002 its reverse (20001112120002), we get a palindrome (40003233230004).

The spelling of 20002121110002 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred ten thousand, two".