21221112010202 has 16 divisors (see below), whose sum is σ = 34280350713000. Its totient is φ = 9794332860672.

The previous prime is 21221112010187. The next prime is 21221112010213. The reversal of 21221112010202 is 20201021112212.

It can be written as a sum of positive squares in 4 ways, for example, as 7423832058241 + 13797279951961 = 2724671^2 + 3714469^2 .

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, 11309174 + ... + 13051422.

Almost surely, 2^{21221112010202} is an apocalyptic number.

21221112010202 is a deficient number, since it is larger than the sum of its proper divisors (13059238702798).

21221112010202 is a wasteful number, since it uses less digits than its factorization.

21221112010202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210737.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221112010202 its reverse (20201021112212), we get a palindrome (41422133122414).

It can be divided in two parts, 21221112010 and 202, that added together give a palindrome (21221112212).

The spelling of 21221112010202 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, ten thousand, two hundred two".