1020321113213 has 4 divisors (see below), whose sum is σ = 1064682900768. Its totient is φ = 975959325660.

The previous prime is 1020321113173. The next prime is 1020321113249. The reversal of 1020321113213 is 3123111230201.

It is a happy number.

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 1020321113213 - 2¹² = 1020321109117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020321110213) 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, 22180893743 + ... + 22180893788.

It is an arithmetic number, because the mean of its divisors is an integer number (266170725192).

Almost surely, 2^{1020321113213} is an apocalyptic number.

It is an amenable number.

1020321113213 is a deficient number, since it is larger than the sum of its proper divisors (44361787555).

1020321113213 is an equidigital number, since it uses as much as digits as its factorization.

1020321113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44361787554.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1020321113213 its reverse (3123111230201), we get a palindrome (4143432343414).

The spelling of 1020321113213 in words is "one trillion, twenty billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred thirteen".