21211202210 has 32 divisors (see below), whose sum is σ = 41736719232. Its totient is φ = 7697306880.

The previous prime is 21211202189. The next prime is 21211202219. The reversal of 21211202210 is 1220211212.

It is not an unprimeable number, because it can be changed into a prime (21211202219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144407 + ... + 251546.

It is an arithmetic number, because the mean of its divisors is an integer number (1304272476).

Almost surely, 2^21211202210 is an apocalyptic number.

21211202210 is a deficient number, since it is larger than the sum of its proper divisors (20525517022).

21211202210 is a wasteful number, since it uses less digits than its factorization.

21211202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396458.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21211202210 its reverse (1220211212), we get a palindrome (22431413422).

The spelling of 21211202210 in words is "twenty-one billion, two hundred eleven million, two hundred two thousand, two hundred ten".