21210220210002 has 8 divisors (see below), whose sum is σ = 42420440420016. Its totient is φ = 7070073403332.

The previous prime is 21210220209977. The next prime is 21210220210007. The reversal of 21210220210002 is 20001202201212.

It is a sphenic number, since it is the product of 3 distinct primes.

21210220210002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21210220210007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767518350828 + ... + 1767518350839.

It is an arithmetic number, because the mean of its divisors is an integer number (5302555052502).

Almost surely, 2^{21210220210002} is an apocalyptic number.

21210220210002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21210220210002 is a wasteful number, since it uses less digits than its factorization.

21210220210002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535036701672.

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

Adding to 21210220210002 its reverse (20001202201212), we get a palindrome (41211422411214).

The spelling of 21210220210002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred ten thousand, two".