2001312420503 has 4 divisors (see below), whose sum is σ = 2183249913288. Its totient is φ = 1819374927720.

The previous prime is 2001312420461. The next prime is 2001312420553. The reversal of 2001312420503 is 3050242131002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001312420503 - 2⁶ = 2001312420439 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 (2001312420553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90968746376 + ... + 90968746397.

It is an arithmetic number, because the mean of its divisors is an integer number (545812478322).

Almost surely, 2^{2001312420503} is an apocalyptic number.

2001312420503 is a deficient number, since it is larger than the sum of its proper divisors (181937492785).

2001312420503 is a wasteful number, since it uses less digits than its factorization.

2001312420503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181937492784.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 2001312420503 its reverse (3050242131002), we get a palindrome (5051554551505).

The spelling of 2001312420503 in words is "two trillion, one billion, three hundred twelve million, four hundred twenty thousand, five hundred three".