21211202202202 has 16 divisors (see below), whose sum is σ = 31876563863232. Its totient is φ = 10585687769280.

The previous prime is 21211202202199. The next prime is 21211202202221. The reversal of 21211202202202 is 20220220211212.

It is a self number, because there is not a number n which added to its sum of digits gives 21211202202202.

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, 4488427 + ... + 7910017.

It is an arithmetic number, because the mean of its divisors is an integer number (1992285241452).

Almost surely, 2^{21211202202202} is an apocalyptic number.

21211202202202 is a deficient number, since it is larger than the sum of its proper divisors (10665361661030).

21211202202202 is a wasteful number, since it uses less digits than its factorization.

21211202202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427413.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21211202202202 its reverse (20220220211212), we get a palindrome (41431422413414).

The spelling of 21211202202202 in words is "twenty-one trillion, two hundred eleven billion, two hundred two million, two hundred two thousand, two hundred two".