130021443 has 20 divisors (see below), whose sum is σ = 194762568. Its totient is φ = 86443200.

The previous prime is 130021429. The next prime is 130021477. The reversal of 130021443 is 344120031.

It is not a de Polignac number, because 130021443 - 2¹⁶ = 129955907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130021043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30480 + ... + 34482.

Almost surely, 2^130021443 is an apocalyptic number.

130021443 is a deficient number, since it is larger than the sum of its proper divisors (64741125).

130021443 is an equidigital number, since it uses as much as digits as its factorization.

130021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 130021443 is about 11402.6945499737. The cubic root of 130021443 is about 506.6075531700.

Adding to 130021443 its reverse (344120031), we get a palindrome (474141474).

The spelling of 130021443 in words is "one hundred thirty million, twenty-one thousand, four hundred forty-three".