21031301232003 has 4 divisors (see below), whose sum is σ = 28041734976008. Its totient is φ = 14020867488000.

The previous prime is 21031301232001. The next prime is 21031301232017. The reversal of 21031301232003 is 30023210313012.

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

It is not a de Polignac number, because 21031301232003 - 2¹ = 21031301232001 is a prime.

It is a super-2 number, since 2×21031301232003² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031301232001) 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, 3505216871998 + ... + 3505216872003.

It is an arithmetic number, because the mean of its divisors is an integer number (7010433744002).

Almost surely, 2^{21031301232003} is an apocalyptic number.

21031301232003 is a deficient number, since it is larger than the sum of its proper divisors (7010433744005).

21031301232003 is an equidigital number, since it uses as much as digits as its factorization.

21031301232003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010433744004.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21031301232003 its reverse (30023210313012), we get a palindrome (51054511545015).

The spelling of 21031301232003 in words is "twenty-one trillion, thirty-one billion, three hundred one million, two hundred thirty-two thousand, three".