10001112220 has 72 divisors (see below), whose sum is σ = 23111024832. Its totient is φ = 3632703360.

The previous prime is 10001112217. The next prime is 10001112227. The reversal of 10001112220 is 2221110001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10001112197 and 10001112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001112227) 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, 2933757 + ... + 2937163.

It is an arithmetic number, because the mean of its divisors is an integer number (320986456).

Almost surely, 2^10001112220 is an apocalyptic number.

10001112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10001112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11555512416).

10001112220 is an abundant number, since it is smaller than the sum of its proper divisors (13109912612).

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

10001112220 is a wasteful number, since it uses less digits than its factorization.

10001112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10001112220 its reverse (2221110001), we get a palindrome (12222222221).

It can be divided in two parts, 10001 and 112220, that added together give a palindrome (122221).

The spelling of 10001112220 in words is "ten billion, one million, one hundred twelve thousand, two hundred twenty".