21100102010202 has 64 divisors (see below), whose sum is σ = 45756510289920. Its totient is φ = 6467433984000.

The previous prime is 21100102010161. The next prime is 21100102010209. The reversal of 21100102010202 is 20201020100112.

It is not an unprimeable number, because it can be changed into a prime (21100102010209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15685927 + ... + 16977882.

It is an arithmetic number, because the mean of its divisors is an integer number (714945473280).

Almost surely, 2^{21100102010202} is an apocalyptic number.

21100102010202 is an abundant number, since it is smaller than the sum of its proper divisors (24656408279718).

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

21100102010202 is a wasteful number, since it uses less digits than its factorization.

21100102010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32664019.

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

Adding to 21100102010202 its reverse (20201020100112), we get a palindrome (41301122110314).

The spelling of 21100102010202 in words is "twenty-one trillion, one hundred billion, one hundred two million, ten thousand, two hundred two".