21200021020010 has 16 divisors (see below), whose sum is σ = 43611471812736. Its totient is φ = 7268578635408.

The previous prime is 21200021019967. The next prime is 21200021020039. The reversal of 21200021020010 is 1002012000212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21200021019973 and 21200021020000.

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, 151428721502 + ... + 151428721641.

It is an arithmetic number, because the mean of its divisors is an integer number (2725716988296).

Almost surely, 2^{21200021020010} is an apocalyptic number.

21200021020010 is an abundant number, since it is smaller than the sum of its proper divisors (22411450792726).

21200021020010 is a wasteful number, since it uses less digits than its factorization.

21200021020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302857443157.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21200021020010 its reverse (1002012000212), we get a palindrome (22202033020222).

The spelling of 21200021020010 in words is "twenty-one trillion, two hundred billion, twenty-one million, twenty thousand, ten".