10001122220 has 24 divisors (see below), whose sum is σ = 21007112784. Its totient is φ = 3999542976.

The previous prime is 10001122211. The next prime is 10001122231. The reversal of 10001122220 is 2222110001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37742 + ... + 146378.

It is an arithmetic number, because the mean of its divisors is an integer number (875296366).

Almost surely, 2^10001122220 is an apocalyptic number.

10001122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001122220 is an abundant number, since it is smaller than the sum of its proper divisors (11005990564).

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

10001122220 is a wasteful number, since it uses less digits than its factorization.

10001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113249 (or 113247 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10001122220 its reverse (2222110001), we get a palindrome (12223232221).

The spelling of 10001122220 in words is "ten billion, one million, one hundred twenty-two thousand, two hundred twenty".