21021103222 has 32 divisors (see below), whose sum is σ = 36437702400. Its totient is φ = 8908986528.

The previous prime is 21021103199. The next prime is 21021103237. The reversal of 21021103222 is 22230112012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021103196 and 21021103205.

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, 784929 + ... + 811267.

It is an arithmetic number, because the mean of its divisors is an integer number (1138678200).

Almost surely, 2^21021103222 is an apocalyptic number.

21021103222 is a deficient number, since it is larger than the sum of its proper divisors (15416599178).

21021103222 is a wasteful number, since it uses less digits than its factorization.

21021103222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26980.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021103222 its reverse (22230112012), we get a palindrome (43251215234).

The spelling of 21021103222 in words is "twenty-one billion, twenty-one million, one hundred three thousand, two hundred twenty-two".