2001002112021 has 16 divisors (see below), whose sum is σ = 3037094115840. Its totient is φ = 1160001223920.

The previous prime is 2001002112007. The next prime is 2001002112029. The reversal of 2001002112021 is 1202112001002.

It is not a de Polignac number, because 2001002112021 - 2¹⁷ = 2001001980949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001002111988 and 2001002112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001002112029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1318182451 + ... + 1318183968.

It is an arithmetic number, because the mean of its divisors is an integer number (189818382240).

Almost surely, 2^{2001002112021} is an apocalyptic number.

It is an amenable number.

2001002112021 is a deficient number, since it is larger than the sum of its proper divisors (1036092003819).

2001002112021 is a wasteful number, since it uses less digits than its factorization.

2001002112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636366456.

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

Adding to 2001002112021 its reverse (1202112001002), we get a palindrome (3203114113023).

The spelling of 2001002112021 in words is "two trillion, one billion, two million, one hundred twelve thousand, twenty-one".