20331020223131 has 4 divisors (see below), whose sum is σ = 20331844734600. Its totient is φ = 20330195711664.

The previous prime is 20331020223127. The next prime is 20331020223133. The reversal of 20331020223131 is 13132202013302.

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 20331020223131 - 2² = 20331020223127 is a prime.

It is a super-2 number, since 2×20331020223131² (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 = 20331020223097 and 20331020223106.

It is not an unprimeable number, because it can be changed into a prime (20331020223133) 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, 412218746 + ... + 412268063.

It is an arithmetic number, because the mean of its divisors is an integer number (5082961183650).

Almost surely, 2^{20331020223131} is an apocalyptic number.

20331020223131 is a deficient number, since it is larger than the sum of its proper divisors (824511469).

20331020223131 is an equidigital number, since it uses as much as digits as its factorization.

20331020223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824511468.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20331020223131 its reverse (13132202013302), we get a palindrome (33463222236433).

The spelling of 20331020223131 in words is "twenty trillion, three hundred thirty-one billion, twenty million, two hundred twenty-three thousand, one hundred thirty-one".