130321111021 has 4 divisors (see below), whose sum is σ = 131195749500. Its totient is φ = 129446472544.

The previous prime is 130321111013. The next prime is 130321111033. The reversal of 130321111021 is 120111123031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120111123031 = 1907 ⋅62984333.

It can be written as a sum of positive squares in 2 ways, for example, as 26388378025 + 103932732996 = 162445^2 + 322386^2 .

It is a cyclic number.

It is not a de Polignac number, because 130321111021 - 2³ = 130321111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130321110986 and 130321111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130321111061) 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, 437319016 + ... + 437319313.

It is an arithmetic number, because the mean of its divisors is an integer number (32798937375).

Almost surely, 2^130321111021 is an apocalyptic number.

It is an amenable number.

130321111021 is a deficient number, since it is larger than the sum of its proper divisors (874638479).

130321111021 is an equidigital number, since it uses as much as digits as its factorization.

130321111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874638478.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 130321111021 its reverse (120111123031), we get a palindrome (250432234052).

The spelling of 130321111021 in words is "one hundred thirty billion, three hundred twenty-one million, one hundred eleven thousand, twenty-one".