130221903 has 8 divisors (see below), whose sum is σ = 198433408. Its totient is φ = 74412504.

The previous prime is 130221869. The next prime is 130221911. The reversal of 130221903 is 309122031.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130221903 - 2²⁵ = 96667471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6201043 = 130221903 / (1 + 3 + 0 + 2 + 2 + 1 + 9 + 0 + 3).

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 130221903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130221983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3100501 + ... + 3100542.

It is an arithmetic number, because the mean of its divisors is an integer number (24804176).

Almost surely, 2^130221903 is an apocalyptic number.

130221903 is a deficient number, since it is larger than the sum of its proper divisors (68211505).

130221903 is an equidigital number, since it uses as much as digits as its factorization.

130221903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201053.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 130221903 is about 11411.4811922029. The cubic root of 130221903 is about 506.8677728230.

Adding to 130221903 its reverse (309122031), we get a palindrome (439343934).

The spelling of 130221903 in words is "one hundred thirty million, two hundred twenty-one thousand, nine hundred three".