2001122121103 has 8 divisors (see below), whose sum is σ = 2287009771808. Its totient is φ = 1715237735904.

The previous prime is 2001122121073. The next prime is 2001122121137. The reversal of 2001122121103 is 3011212211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001122121103 - 2⁵ = 2001122121071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001123121103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679525 + ... + 2112817.

It is an arithmetic number, because the mean of its divisors is an integer number (285876221476).

Almost surely, 2^{2001122121103} is an apocalyptic number.

2001122121103 is a deficient number, since it is larger than the sum of its proper divisors (285887650705).

2001122121103 is a wasteful number, since it uses less digits than its factorization.

2001122121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632753.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2001122121103 its reverse (3011212211002), we get a palindrome (5012334332105).

The spelling of 2001122121103 in words is "two trillion, one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred three".