20321330110331 has 4 divisors (see below), whose sum is σ = 20343636730464. Its totient is φ = 20299023490200.

The previous prime is 20321330110303. The next prime is 20321330110387. The reversal of 20321330110331 is 13301103312302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321330110331 is a prime.

It is a super-2 number, since 2×20321330110331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321330110297 and 20321330110306.

It is not an unprimeable number, because it can be changed into a prime (20321230110331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11153308700 + ... + 11153310521.

It is an arithmetic number, because the mean of its divisors is an integer number (5085909182616).

Almost surely, 2^{20321330110331} is an apocalyptic number.

20321330110331 is a deficient number, since it is larger than the sum of its proper divisors (22306620133).

20321330110331 is an equidigital number, since it uses as much as digits as its factorization.

20321330110331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22306620132.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20321330110331 its reverse (13301103312302), we get a palindrome (33622433422633).

The spelling of 20321330110331 in words is "twenty trillion, three hundred twenty-one billion, three hundred thirty million, one hundred ten thousand, three hundred thirty-one".