2001212000121 has 16 divisors (see below), whose sum is σ = 2760582686400. Its totient is φ = 1288000999488.

The previous prime is 2001212000101. The next prime is 2001212000159. The reversal of 2001212000121 is 1210002121002.

It is not a de Polignac number, because 2001212000121 - 2¹⁹ = 2001211475833 is a prime.

It is a super-3 number, since 3×2001212000121³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001212000097 and 2001212000106.

It is not an unprimeable number, because it can be changed into a prime (2001212000101) 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, 374106 + ... + 2035283.

It is an arithmetic number, because the mean of its divisors is an integer number (172536417900).

Almost surely, 2^{2001212000121} is an apocalyptic number.

It is an amenable number.

2001212000121 is a deficient number, since it is larger than the sum of its proper divisors (759370686279).

2001212000121 is a wasteful number, since it uses less digits than its factorization.

2001212000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418968.

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

Adding to 2001212000121 its reverse (1210002121002), we get a palindrome (3211214121123).

The spelling of 2001212000121 in words is "two trillion, one billion, two hundred twelve million, one hundred twenty-one", and thus it is an aban number.