2001212112403 has 16 divisors (see below), whose sum is σ = 2293123783680. Its totient is φ = 1710810009216.

The previous prime is 2001212112391. The next prime is 2001212112407. The reversal of 2001212112403 is 3042112121002.

It is not a de Polignac number, because 2001212112403 - 2³⁷ = 1863773158931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001212112407) 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, 6755076 + ... + 7045102.

It is an arithmetic number, because the mean of its divisors is an integer number (143320236480).

Almost surely, 2^{2001212112403} is an apocalyptic number.

2001212112403 is a deficient number, since it is larger than the sum of its proper divisors (291911671277).

2001212112403 is a wasteful number, since it uses less digits than its factorization.

2001212112403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292626.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2001212112403 its reverse (3042112121002), we get a palindrome (5043324233405).

The spelling of 2001212112403 in words is "two trillion, one billion, two hundred twelve million, one hundred twelve thousand, four hundred three".