130001021 has 4 divisors (see below), whose sum is σ = 136843200. Its totient is φ = 123158844.

The previous prime is 130001009. The next prime is 130001029. The reversal of 130001021 is 120100031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120100031 = 139 ⋅864029.

It is a cyclic number.

It is not a de Polignac number, because 130001021 - 2⁶ = 130000957 is a prime.

It is a super-2 number, since 2×130001021² = 33800530922084882, which 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 (130001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421061 + ... + 3421098.

It is an arithmetic number, because the mean of its divisors is an integer number (34210800).

Almost surely, 2^130001021 is an apocalyptic number.

It is an amenable number.

130001021 is a deficient number, since it is larger than the sum of its proper divisors (6842179).

130001021 is an equidigital number, since it uses as much as digits as its factorization.

130001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842178.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 130001021 is about 11401.7990247154. The cubic root of 130001021 is about 506.5810281063.

Adding to 130001021 its reverse (120100031), we get a palindrome (250101052).

It can be divided in two parts, 1300010 and 21, that added together give a palindrome (1300031).

The spelling of 130001021 in words is "one hundred thirty million, one thousand, twenty-one".