2001203445144 has 64 divisors (see below), whose sum is σ = 5065553132640. Its totient is φ = 658758389760.

The previous prime is 2001203445139. The next prime is 2001203445149. The reversal of 2001203445144 is 4415443021002.

It is an interprime number because it is at equal distance from previous prime (2001203445139) and next prime (2001203445149).

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, 140862 + ... + 2005554.

Almost surely, 2^{2001203445144} is an apocalyptic number.

2001203445144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001203445144 is an abundant number, since it is smaller than the sum of its proper divisors (3064349687496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001203445144 is a wasteful number, since it uses less digits than its factorization.

2001203445144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865260 (or 1865256 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 2001203445144 its reverse (4415443021002), we get a palindrome (6416646466146).

The spelling of 2001203445144 in words is "two trillion, one billion, two hundred three million, four hundred forty-five thousand, one hundred forty-four".