2130310021 has 8 divisors (see below), whose sum is σ = 2494021824.
Its totient is φ = 1781443680.
The previous prime is 2130310019. The next prime is 2130310093. The reversal of 2130310021 is 1200130312.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 2130310021 - 21 = 2130310019 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 2130309983 and 2130310010.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2130310621) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711055 + ... + 3711628.
It is an arithmetic number, because the mean of its divisors is an integer number (311752728).
Almost surely, 22130310021 is an apocalyptic number.
It is an amenable number.
2130310021 is a deficient number, since it is larger than the sum of its proper divisors (363711803).
2130310021 is an equidigital number, since it uses as much as digits as its factorization.
2130310021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7422731.
The product of its (nonzero) digits is 36, while the sum is 13.
The square root of 2130310021 is about 46155.2816154338.
The cubic root of 2130310021 is about 1286.7107719839.
Adding to 2130310021 its reverse (1200130312), we get a palindrome (3330440333).
The spelling of 2130310021 in words is "two billion, one hundred thirty million, three hundred ten thousand, twenty-one".