21202110222 has 64 divisors (see below), whose sum is σ = 46249125120. Its totient is φ = 6456651264.

The previous prime is 21202110211. The next prime is 21202110229. The reversal of 21202110222 is 22201120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202110229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454393 + ... + 498875.

It is an arithmetic number, because the mean of its divisors is an integer number (722642580).

Almost surely, 2^21202110222 is an apocalyptic number.

21202110222 is an abundant number, since it is smaller than the sum of its proper divisors (25047014898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202110222 is a wasteful number, since it uses less digits than its factorization.

21202110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44657.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202110222 its reverse (22201120212), we get a palindrome (43403230434).

The spelling of 21202110222 in words is "twenty-one billion, two hundred two million, one hundred ten thousand, two hundred twenty-two".