21102202222 has 16 divisors (see below), whose sum is σ = 32352840000. Its totient is φ = 10318284288.

The previous prime is 21102202211. The next prime is 21102202223. The reversal of 21102202222 is 22220220112.

It is a junction number, because it is equal to n+sod(n) for n = 21102202196 and 21102202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102202223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27538 + ... + 207274.

It is an arithmetic number, because the mean of its divisors is an integer number (2022052500).

Almost surely, 2^21102202222 is an apocalyptic number.

21102202222 is a deficient number, since it is larger than the sum of its proper divisors (11250637778).

21102202222 is a wasteful number, since it uses less digits than its factorization.

21102202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181035.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21102202222 its reverse (22220220112), we get a palindrome (43322422334).

The spelling of 21102202222 in words is "twenty-one billion, one hundred two million, two hundred two thousand, two hundred twenty-two".