21220100110220 has 48 divisors (see below), whose sum is σ = 48622189206528. Its totient is φ = 7714992269760.

The previous prime is 21220100110217. The next prime is 21220100110241. The reversal of 21220100110220 is 2201100102212.

It is a super-2 number, since 2×21220100110220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220100110195 and 21220100110204.

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, 7589564 + ... + 10002083.

It is an arithmetic number, because the mean of its divisors is an integer number (1012962275136).

Almost surely, 2^{21220100110220} is an apocalyptic number.

21220100110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220100110220 is an abundant number, since it is smaller than the sum of its proper divisors (27402089096308).

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

21220100110220 is a wasteful number, since it uses less digits than its factorization.

21220100110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17597150 (or 17597148 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220100110220 its reverse (2201100102212), we get a palindrome (23421200212432).

The spelling of 21220100110220 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, one hundred ten thousand, two hundred twenty".