10001122020 has 72 divisors (see below), whose sum is σ = 30834094200. Its totient is φ = 2623242240.

The previous prime is 10001122013. The next prime is 10001122031. The reversal of 10001122020 is 2022110001.

It can be written as a sum of positive squares in 4 ways, for example, as 18714276 + 9982407744 = 4326^2 + 99912^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10001121993 and 10001122011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444445 + ... + 466404.

Almost surely, 2^10001122020 is an apocalyptic number.

10001122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001122020 is an abundant number, since it is smaller than the sum of its proper divisors (20832972180).

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

10001122020 is a wasteful number, since it uses less digits than its factorization.

10001122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910925 (or 910920 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10001122020 its reverse (2022110001), we get a palindrome (12023232021).

The spelling of 10001122020 in words is "ten billion, one million, one hundred twenty-two thousand, twenty".