130221212221 has 4 divisors (see below), whose sum is σ = 130255296444. Its totient is φ = 130187128000.

The previous prime is 130221212197. The next prime is 130221212237. The reversal of 130221212221 is 122212122031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122212122031 = 19 ⋅6432216949.

It can be written as a sum of positive squares in 2 ways, for example, as 58993608996 + 71227603225 = 242886^2 + 266885^2 .

It is a cyclic number.

It is not a de Polignac number, because 130221212221 - 2¹¹ = 130221210173 is a prime.

It is a super-2 number, since 2×130221212221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130221212281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17036380 + ... + 17044021.

It is an arithmetic number, because the mean of its divisors is an integer number (32563824111).

Almost surely, 2^130221212221 is an apocalyptic number.

It is an amenable number.

130221212221 is a deficient number, since it is larger than the sum of its proper divisors (34084223).

130221212221 is an equidigital number, since it uses as much as digits as its factorization.

130221212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34084222.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 130221212221 its reverse (122212122031), we get a palindrome (252433334252).

The spelling of 130221212221 in words is "one hundred thirty billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".