130620221 has 4 divisors (see below), whose sum is σ = 131037852. Its totient is φ = 130202592.

The previous prime is 130620173. The next prime is 130620223. The reversal of 130620221 is 122026031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122026031 = 89 ⋅1371079.

It can be written as a sum of positive squares in 2 ways, for example, as 70324996 + 60295225 = 8386^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 130620221 - 2⁶ = 130620157 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 130620221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130620223) 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, 208346 + ... + 208971.

It is an arithmetic number, because the mean of its divisors is an integer number (32759463).

Almost surely, 2^130620221 is an apocalyptic number.

It is an amenable number.

130620221 is a deficient number, since it is larger than the sum of its proper divisors (417631).

130620221 is an equidigital number, since it uses as much as digits as its factorization.

130620221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417630.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 130620221 is about 11428.9203777085. The cubic root of 130620221 is about 507.3840430068.

Adding to 130620221 its reverse (122026031), we get a palindrome (252646252).

The spelling of 130620221 in words is "one hundred thirty million, six hundred twenty thousand, two hundred twenty-one".