21211002202202 has 16 divisors (see below), whose sum is σ = 33567345556800. Its totient is φ = 10024429998240.

The previous prime is 21211002202163. The next prime is 21211002202223. The reversal of 21211002202202 is 20220220011212.

It is a happy number.

It is a super-2 number, since 2×21211002202202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635728499 + ... + 635761862.

It is an arithmetic number, because the mean of its divisors is an integer number (2097959097300).

Almost surely, 2^{21211002202202} is an apocalyptic number.

21211002202202 is a deficient number, since it is larger than the sum of its proper divisors (12356343354598).

21211002202202 is a wasteful number, since it uses less digits than its factorization.

21211002202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271490821.

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

Adding to 21211002202202 its reverse (20220220011212), we get a palindrome (41431222213414).

The spelling of 21211002202202 in words is "twenty-one trillion, two hundred eleven billion, two million, two hundred two thousand, two hundred two".