2001120012021 has 32 divisors (see below), whose sum is σ = 2891624214528. Its totient is φ = 1223654604480.

The previous prime is 2001120012007. The next prime is 2001120012077. The reversal of 2001120012021 is 1202100211002.

It is not a de Polignac number, because 2001120012021 - 2⁷ = 2001120011893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001120011988 and 2001120012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001120012721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19011066 + ... + 19116036.

It is an arithmetic number, because the mean of its divisors is an integer number (90363256704).

Almost surely, 2^{2001120012021} is an apocalyptic number.

It is an amenable number.

2001120012021 is a deficient number, since it is larger than the sum of its proper divisors (890504202507).

2001120012021 is a wasteful number, since it uses less digits than its factorization.

2001120012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108081.

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

Adding to 2001120012021 its reverse (1202100211002), we get a palindrome (3203220223023).

The spelling of 2001120012021 in words is "two trillion, one billion, one hundred twenty million, twelve thousand, twenty-one".