201231321023003 has 4 divisors (see below), whose sum is σ = 201312890267880. Its totient is φ = 201149751778128.

The previous prime is 201231321022981. The next prime is 201231321023059. The reversal of 201231321023003 is 300320123132102.

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 201231321023003 - 2²⁰ = 201231319974427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201231321023003.

It is not an unprimeable number, because it can be changed into a prime (201231321023303) 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, 40784618738 + ... + 40784623671.

It is an arithmetic number, because the mean of its divisors is an integer number (50328222566970).

Almost surely, 2^{201231321023003} is an apocalyptic number.

201231321023003 is a deficient number, since it is larger than the sum of its proper divisors (81569244877).

201231321023003 is an equidigital number, since it uses as much as digits as its factorization.

201231321023003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81569244876.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 201231321023003 its reverse (300320123132102), we get a palindrome (501551444155105).

The spelling of 201231321023003 in words is "two hundred one trillion, two hundred thirty-one billion, three hundred twenty-one million, twenty-three thousand, three".