2130321302021 has 4 divisors (see below), whose sum is σ = 2323986874944. Its totient is φ = 1936655729100.

The previous prime is 2130321302009. The next prime is 2130321302077. The reversal of 2130321302021 is 1202031230312.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130321302021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130321301984 and 2130321302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130321302321) 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, 96832786445 + ... + 96832786466.

It is an arithmetic number, because the mean of its divisors is an integer number (580996718736).

Almost surely, 2^{2130321302021} is an apocalyptic number.

It is an amenable number.

2130321302021 is a deficient number, since it is larger than the sum of its proper divisors (193665572923).

2130321302021 is a wasteful number, since it uses less digits than its factorization.

2130321302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193665572922.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2130321302021 its reverse (1202031230312), we get a palindrome (3332352532333).

It can be divided in two parts, 2130321 and 302021, that added together give a palindrome (2432342).

The spelling of 2130321302021 in words is "two trillion, one hundred thirty billion, three hundred twenty-one million, three hundred two thousand, twenty-one".