2001203445143 has 16 divisors (see below), whose sum is σ = 2387239464960. Its totient is φ = 1640249324736.

The previous prime is 2001203445139. The next prime is 2001203445149. The reversal of 2001203445143 is 3415443021002.

It is not a de Polignac number, because 2001203445143 - 2² = 2001203445139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001203445149) 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, 1309430 + ... + 2391027.

It is an arithmetic number, because the mean of its divisors is an integer number (149202466560).

Almost surely, 2^{2001203445143} is an apocalyptic number.

2001203445143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2001203445143 is a deficient number, since it is larger than the sum of its proper divisors (386036019817).

2001203445143 is a wasteful number, since it uses less digits than its factorization.

2001203445143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703846.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 2001203445143 its reverse (3415443021002), we get a palindrome (5416646466145).

The spelling of 2001203445143 in words is "two trillion, one billion, two hundred three million, four hundred forty-five thousand, one hundred forty-three".