130221145 has 4 divisors (see below), whose sum is σ = 156265380. Its totient is φ = 104176912.

The previous prime is 130221121. The next prime is 130221187. The reversal of 130221145 is 541122031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72658576 + 57562569 = 8524^2 + 7587^2 .

It is a cyclic number.

It is not a de Polignac number, because 130221145 - 2²¹ = 128123993 is a prime.

It is a super-2 number, since 2×130221145² = 33915093210222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13022110 + ... + 13022119.

It is an arithmetic number, because the mean of its divisors is an integer number (39066345).

Almost surely, 2^130221145 is an apocalyptic number.

It is an amenable number.

130221145 is a deficient number, since it is larger than the sum of its proper divisors (26044235).

130221145 is an equidigital number, since it uses as much as digits as its factorization.

130221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26044234.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 130221145 is about 11411.4479799892. The cubic root of 130221145 is about 506.8667893568.

Adding to 130221145 its reverse (541122031), we get a palindrome (671343176).

The spelling of 130221145 in words is "one hundred thirty million, two hundred twenty-one thousand, one hundred forty-five".