130221001021 has 4 divisors (see below), whose sum is σ = 130250540700. Its totient is φ = 130191461344.

The previous prime is 130221000869. The next prime is 130221001069. The reversal of 130221001021 is 120100122031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120100122031 = 46229 ⋅2597939.

It can be written as a sum of positive squares in 2 ways, for example, as 28835436100 + 101385564921 = 169810^2 + 318411^2 .

It is a cyclic number.

It is not a de Polignac number, because 130221001021 - 2¹³ = 130220992829 is a prime.

It is a super-2 number, since 2×130221001021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130221000992 and 130221001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130221001091) 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, 14763226 + ... + 14772043.

It is an arithmetic number, because the mean of its divisors is an integer number (32562635175).

Almost surely, 2^130221001021 is an apocalyptic number.

It is an amenable number.

130221001021 is a deficient number, since it is larger than the sum of its proper divisors (29539679).

130221001021 is an equidigital number, since it uses as much as digits as its factorization.

130221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29539678.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 130221001021 its reverse (120100122031), we get a palindrome (250321123052).

The spelling of 130221001021 in words is "one hundred thirty billion, two hundred twenty-one million, one thousand, twenty-one".