20102211012220 has 24 divisors (see below), whose sum is σ = 42230412622944. Its totient is φ = 8037880691136.

The previous prime is 20102211012089. The next prime is 20102211012227. The reversal of 20102211012220 is 2221011220102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20102211012194 and 20102211012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102211012227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187677232 + ... + 187784311.

It is an arithmetic number, because the mean of its divisors is an integer number (1759600525956).

Almost surely, 2^{20102211012220} is an apocalyptic number.

20102211012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102211012220 is an abundant number, since it is smaller than the sum of its proper divisors (22128201610724).

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

20102211012220 is a wasteful number, since it uses less digits than its factorization.

20102211012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375464229 (or 375464227 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20102211012220 its reverse (2221011220102), we get a palindrome (22323222232322).

The spelling of 20102211012220 in words is "twenty trillion, one hundred two billion, two hundred eleven million, twelve thousand, two hundred twenty".