2001001021122 has 16 divisors (see below), whose sum is σ = 4017946276512. Its totient is φ = 664342968000.

The previous prime is 2001001021079. The next prime is 2001001021139. The reversal of 2001001021122 is 2211201001002.

It is a junction number, because it is equal to n+sod(n) for n = 2001001021098 and 2001001021107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664341463 + ... + 664344474.

It is an arithmetic number, because the mean of its divisors is an integer number (251121642282).

Almost surely, 2^{2001001021122} is an apocalyptic number.

2001001021122 is an abundant number, since it is smaller than the sum of its proper divisors (2016945255390).

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

2001001021122 is a wasteful number, since it uses less digits than its factorization.

2001001021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328686193.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001001021122 its reverse (2211201001002), we get a palindrome (4212202022124).

The spelling of 2001001021122 in words is "two trillion, one billion, one million, twenty-one thousand, one hundred twenty-two".