130021603 has 4 divisors (see below), whose sum is σ = 130053168. Its totient is φ = 129990040.

The previous prime is 130021601. The next prime is 130021649. The reversal of 130021603 is 306120031.

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 130021603 - 2¹ = 130021601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130021601) 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, 8476 + ... + 18217.

It is an arithmetic number, because the mean of its divisors is an integer number (32513292).

Almost surely, 2^130021603 is an apocalyptic number.

130021603 is a deficient number, since it is larger than the sum of its proper divisors (31565).

130021603 is an equidigital number, since it uses as much as digits as its factorization.

130021603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31564.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 130021603 is about 11402.7015658571. The cubic root of 130021603 is about 506.6077609746.

Adding to 130021603 its reverse (306120031), we get a palindrome (436141634).

The spelling of 130021603 in words is "one hundred thirty million, twenty-one thousand, six hundred three".