1012530206321 has 4 divisors (see below), whose sum is σ = 1019920937892. Its totient is φ = 1005139474752.

The previous prime is 1012530206279. The next prime is 1012530206353. The reversal of 1012530206321 is 1236020352101.

It is a happy number.

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 375229753600 + 637300452721 = 612560^2 + 798311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012530206321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012530206021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3695365580 + ... + 3695365853.

It is an arithmetic number, because the mean of its divisors is an integer number (254980234473).

Almost surely, 2^{1012530206321} is an apocalyptic number.

It is an amenable number.

1012530206321 is a deficient number, since it is larger than the sum of its proper divisors (7390731571).

1012530206321 is an equidigital number, since it uses as much as digits as its factorization.

1012530206321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390731570.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 1012530206321 its reverse (1236020352101), we get a palindrome (2248550558422).

The spelling of 1012530206321 in words is "one trillion, twelve billion, five hundred thirty million, two hundred six thousand, three hundred twenty-one".