21202020210102 has 16 divisors (see below), whose sum is σ = 43550095567152. Its totient is φ = 6876330878880.

The previous prime is 21202020210097. The next prime is 21202020210113. The reversal of 21202020210102 is 20101202020212.

It is a congruent number.

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, 47752297549 + ... + 47752297992.

It is an arithmetic number, because the mean of its divisors is an integer number (2721880972947).

Almost surely, 2^{21202020210102} is an apocalyptic number.

21202020210102 is an abundant number, since it is smaller than the sum of its proper divisors (22348075357050).

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

21202020210102 is a wasteful number, since it uses less digits than its factorization.

21202020210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95504595583.

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

Adding to 21202020210102 its reverse (20101202020212), we get a palindrome (41303222230314).

The spelling of 21202020210102 in words is "twenty-one trillion, two hundred two billion, twenty million, two hundred ten thousand, one hundred two".