20102221103220 has 72 divisors (see below), whose sum is σ = 62624757295464. Its totient is φ = 5215711419648.

The previous prime is 20102221103213. The next prime is 20102221103227. The reversal of 20102221103220 is 2230112220102.

20102221103220 is a `hidden beast` number, since 2 + 0 + 10 + 222 + 110 + 322 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20102221103213) and next prime (20102221103227).

It can be written as a sum of positive squares in 4 ways, for example, as 2978068101264 + 17124153001956 = 1725708^2 + 4138134^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20102221103193 and 20102221103202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102221103227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1509169099 + ... + 1509182418.

Almost surely, 2^{20102221103220} is an apocalyptic number.

20102221103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102221103220 is an abundant number, since it is smaller than the sum of its proper divisors (42522536192244).

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

20102221103220 is a wasteful number, since it uses less digits than its factorization.

20102221103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018351569 (or 3018351564 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20102221103220 its reverse (2230112220102), we get a palindrome (22332333323322).

The spelling of 20102221103220 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, one hundred three thousand, two hundred twenty".