1020331320311 has 4 divisors (see below), whose sum is σ = 1020333925800. Its totient is φ = 1020328714824.

The previous prime is 1020331320287. The next prime is 1020331320367. The reversal of 1020331320311 is 1130231330201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020331320311 - 2¹⁸ = 1020331058167 is a prime.

It is a super-2 number, since 2×1020331320311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020331520311) 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, 582656 + ... + 1542773.

It is an arithmetic number, because the mean of its divisors is an integer number (255083481450).

Almost surely, 2^{1020331320311} is an apocalyptic number.

1020331320311 is a deficient number, since it is larger than the sum of its proper divisors (2605489).

1020331320311 is an equidigital number, since it uses as much as digits as its factorization.

1020331320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605488.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1020331320311 its reverse (1130231330201), we get a palindrome (2150562650512).

The spelling of 1020331320311 in words is "one trillion, twenty billion, three hundred thirty-one million, three hundred twenty thousand, three hundred eleven".