2001200112121 has 16 divisors (see below), whose sum is σ = 2386614878208. Its totient is φ = 1640673262800.

The previous prime is 2001200112103. The next prime is 2001200112133. The reversal of 2001200112121 is 1212110021002.

It is a cyclic number.

It is not a de Polignac number, because 2001200112121 - 2³⁹ = 1451444298233 is a prime.

It is a super-2 number, since 2×2001200112121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001200112181) 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, 4291276 + ... + 4734706.

It is an arithmetic number, because the mean of its divisors is an integer number (149163429888).

Almost surely, 2^{2001200112121} is an apocalyptic number.

It is an amenable number.

2001200112121 is a deficient number, since it is larger than the sum of its proper divisors (385414766087).

2001200112121 is a wasteful number, since it uses less digits than its factorization.

2001200112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471492.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001200112121 its reverse (1212110021002), we get a palindrome (3213310133123).

The spelling of 2001200112121 in words is "two trillion, one billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".