2012101321 has 4 divisors (see below), whose sum is σ = 2042132752. Its totient is φ = 1982069892.

The previous prime is 2012101319. The next prime is 2012101339. The reversal of 2012101321 is 1231012102.

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 not a de Polignac number, because 2012101321 - 2¹ = 2012101319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012141321) 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, 15015615 + ... + 15015748.

It is an arithmetic number, because the mean of its divisors is an integer number (510533188).

Almost surely, 2^2012101321 is an apocalyptic number.

It is an amenable number.

2012101321 is a deficient number, since it is larger than the sum of its proper divisors (30031431).

2012101321 is an equidigital number, since it uses as much as digits as its factorization.

2012101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30031430.

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

The square root of 2012101321 is about 44856.4523898179. The cubic root of 2012101321 is about 1262.4570600825.

Adding to 2012101321 its reverse (1231012102), we get a palindrome (3243113423).

The spelling of 2012101321 in words is "two billion, twelve million, one hundred one thousand, three hundred twenty-one".