21212020102202 has 16 divisors (see below), whose sum is σ = 33339188025792. Its totient is φ = 10102784239680.

The previous prime is 21212020102181. The next prime is 21212020102219. The reversal of 21212020102202 is 20220102021212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956691968 + ... + 956714139.

It is an arithmetic number, because the mean of its divisors is an integer number (2083699251612).

Almost surely, 2^{21212020102202} is an apocalyptic number.

21212020102202 is a deficient number, since it is larger than the sum of its proper divisors (12127167923590).

21212020102202 is a wasteful number, since it uses less digits than its factorization.

21212020102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913406373.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212020102202 its reverse (20220102021212), we get a palindrome (41432122123414).

The spelling of 21212020102202 in words is "twenty-one trillion, two hundred twelve billion, twenty million, one hundred two thousand, two hundred two".