21211222202 has 16 divisors (see below), whose sum is σ = 32680785312. Its totient is φ = 10321441680.

The previous prime is 21211222189. The next prime is 21211222217. The reversal of 21211222202 is 20222211212.

It is a happy number.

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, 942449 + ... + 964692.

It is an arithmetic number, because the mean of its divisors is an integer number (2042549082).

Almost surely, 2^21211222202 is an apocalyptic number.

21211222202 is a deficient number, since it is larger than the sum of its proper divisors (11469563110).

21211222202 is a wasteful number, since it uses less digits than its factorization.

21211222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907293.

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

Adding to 21211222202 its reverse (20222211212), we get a palindrome (41433433414).

The spelling of 21211222202 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred two".