21220211110 has 32 divisors (see below), whose sum is σ = 44060993280. Its totient is φ = 7207503072.

The previous prime is 21220211099. The next prime is 21220211141. The reversal of 21220211110 is 1111202212.

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, 1409080 + ... + 1424059.

It is an arithmetic number, because the mean of its divisors is an integer number (1376906040).

Almost surely, 2^21220211110 is an apocalyptic number.

21220211110 is an abundant number, since it is smaller than the sum of its proper divisors (22840782170).

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

21220211110 is a wasteful number, since it uses less digits than its factorization.

21220211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833260.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21220211110 its reverse (1111202212), we get a palindrome (22331413322).

The spelling of 21220211110 in words is "twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred ten".