21101308222 has 32 divisors (see below), whose sum is σ = 33851105280. Its totient is φ = 9843224160.

The previous prime is 21101308201. The next prime is 21101308231. The reversal of 21101308222 is 22280310112.

It is a junction number, because it is equal to n+sod(n) for n = 21101308193 and 21101308202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1219443 + ... + 1236625.

It is an arithmetic number, because the mean of its divisors is an integer number (1057847040).

Almost surely, 2^21101308222 is an apocalyptic number.

21101308222 is a deficient number, since it is larger than the sum of its proper divisors (12749797058).

21101308222 is a wasteful number, since it uses less digits than its factorization.

21101308222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17928.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21101308222 its reverse (22280310112), we get a palindrome (43381618334).

The spelling of 21101308222 in words is "twenty-one billion, one hundred one million, three hundred eight thousand, two hundred twenty-two".