1012120310321 has 4 divisors (see below), whose sum is σ = 1014833769972. Its totient is φ = 1009406850672.

The previous prime is 1012120310317. The next prime is 1012120310359. The reversal of 1012120310321 is 1230130212101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 715988437921 + 296131872400 = 846161^2 + 544180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012120310321 - 2² = 1012120310317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012120310321.

It is not an unprimeable number, because it can be changed into a prime (1012120312321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356729266 + ... + 1356730011.

It is an arithmetic number, because the mean of its divisors is an integer number (253708442493).

Almost surely, 2^{1012120310321} is an apocalyptic number.

It is an amenable number.

1012120310321 is a deficient number, since it is larger than the sum of its proper divisors (2713459651).

1012120310321 is an equidigital number, since it uses as much as digits as its factorization.

1012120310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713459650.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1012120310321 its reverse (1230130212101), we get a palindrome (2242250522422).

The spelling of 1012120310321 in words is "one trillion, twelve billion, one hundred twenty million, three hundred ten thousand, three hundred twenty-one".