21101202222 has 16 divisors (see below), whose sum is σ = 42421072080. Its totient is φ = 6997289472.

The previous prime is 21101202217. The next prime is 21101202251. The reversal of 21101202222 is 22220210112.

It is a congruent 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, 9109897 + ... + 9112212.

It is an arithmetic number, because the mean of its divisors is an integer number (2651317005).

Almost surely, 2^21101202222 is an apocalyptic number.

21101202222 is an abundant number, since it is smaller than the sum of its proper divisors (21319869858).

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

21101202222 is a wasteful number, since it uses less digits than its factorization.

21101202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18222307.

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

Adding to 21101202222 its reverse (22220210112), we get a palindrome (43321412334).

The spelling of 21101202222 in words is "twenty-one billion, one hundred one million, two hundred two thousand, two hundred twenty-two".