130031221 has 8 divisors (see below), whose sum is σ = 133208640. Its totient is φ = 126886368.

The previous prime is 130031197. The next prime is 130031233. The reversal of 130031221 is 122130031.

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

It is a cyclic number.

It is not a de Polignac number, because 130031221 - 2⁵ = 130031189 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 (130034221) 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, 40 + ... + 16126.

It is an arithmetic number, because the mean of its divisors is an integer number (16651080).

Almost surely, 2^130031221 is an apocalyptic number.

It is an amenable number.

130031221 is a deficient number, since it is larger than the sum of its proper divisors (3177419).

130031221 is a wasteful number, since it uses less digits than its factorization.

130031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16283.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 130031221 is about 11403.1233002191. The cubic root of 130031221 is about 506.6202523176.

Adding to 130031221 its reverse (122130031), we get a palindrome (252161252).

The spelling of 130031221 in words is "one hundred thirty million, thirty-one thousand, two hundred twenty-one".