21210102010002 has 16 divisors (see below), whose sum is σ = 42420514540320. Its totient is φ = 7069982249952.

The previous prime is 21210102009989. The next prime is 21210102010093. The reversal of 21210102010002 is 20001020101212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210102010002.

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, 12045643 + ... + 13693710.

It is an arithmetic number, because the mean of its divisors is an integer number (2651282158770).

Almost surely, 2^{21210102010002} is an apocalyptic number.

21210102010002 is an abundant number, since it is smaller than the sum of its proper divisors (21210412530318).

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

21210102010002 is a wasteful number, since it uses less digits than its factorization.

21210102010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25876697.

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

Adding to 21210102010002 its reverse (20001020101212), we get a palindrome (41211122111214).

The spelling of 21210102010002 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, ten thousand, two".