8101101220 has 24 divisors (see below), whose sum is σ = 17014213944. Its totient is φ = 3240078336.

The previous prime is 8101101209. The next prime is 8101101221. The reversal of 8101101220 is 221011018.

It can be written as a sum of positive squares in 4 ways, for example, as 305270784 + 7795830436 = 17472^2 + 88294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8101101194 and 8101101203.

It is not an unprimeable number, because it can be changed into a prime (8101101221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229044 + ... + 262036.

It is an arithmetic number, because the mean of its divisors is an integer number (708925581).

Almost surely, 2^8101101220 is an apocalyptic number.

It is an amenable number.

8101101220 is an abundant number, since it is smaller than the sum of its proper divisors (8913112724).

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

8101101220 is a wasteful number, since it uses less digits than its factorization.

8101101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45279 (or 45277 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 8101101220 is about 90006.1176809666. The cubic root of 8101101220 is about 2008.3898575981.

Adding to 8101101220 its reverse (221011018), we get a palindrome (8322112238).

The spelling of 8101101220 in words is "eight billion, one hundred one million, one hundred one thousand, two hundred twenty".