10001122222220 has 48 divisors (see below), whose sum is σ = 21174570039168. Its totient is φ = 3967779962880.

The previous prime is 10001122222121. The next prime is 10001122222229. The reversal of 10001122222220 is 2222222110001.

It is a happy number.

It is a super-2 number, since 2×10001122222220² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10001122222229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2977796 + ... + 5373035.

It is an arithmetic number, because the mean of its divisors is an integer number (441136875816).

Almost surely, 2^{10001122222220} is an apocalyptic number.

10001122222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001122222220 is an abundant number, since it is smaller than the sum of its proper divisors (11173447816948).

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

10001122222220 is a wasteful number, since it uses less digits than its factorization.

10001122222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351330 (or 8351328 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10001122222220 its reverse (2222222110001), we get a palindrome (12223344332221).

It can be divided in two parts, 10001 and 122222220, that added together give a palindrome (122232221).

The spelling of 10001122222220 in words is "ten trillion, one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".