2001212001021 has 16 divisors (see below), whose sum is σ = 2692051467840. Its totient is φ = 1322258300160.

The previous prime is 2001212000951. The next prime is 2001212001031. The reversal of 2001212001021 is 1201002121002.

It is not a de Polignac number, because 2001212001021 - 2¹⁴ = 2001211984637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001212000988 and 2001212001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001212001031) 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, 6031626 + ... + 6354756.

It is an arithmetic number, because the mean of its divisors is an integer number (168253216740).

Almost surely, 2^{2001212001021} is an apocalyptic number.

It is an amenable number.

2001212001021 is a deficient number, since it is larger than the sum of its proper divisors (690839466819).

2001212001021 is a wasteful number, since it uses less digits than its factorization.

2001212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341516.

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

Adding to 2001212001021 its reverse (1201002121002), we get a palindrome (3202214122023).

The spelling of 2001212001021 in words is "two trillion, one billion, two hundred twelve million, one thousand, twenty-one".