331020111113 has 4 divisors (see below), whose sum is σ = 331907564868. Its totient is φ = 330132657360.

The previous prime is 331020111101. The next prime is 331020111173. The reversal of 331020111113 is 311111020133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311111020133 = 18859 ⋅16496687.

It can be written as a sum of positive squares in 2 ways, for example, as 243159444544 + 87860666569 = 493112^2 + 296413^2 .

It is a cyclic number.

It is not a de Polignac number, because 331020111113 - 2¹⁴ = 331020094729 is a prime.

It is a super-2 number, since 2×331020111113² (a number of 24 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 = 331020111091 and 331020111100.

It is not an unprimeable number, because it can be changed into a prime (331020111173) 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, 443726318 + ... + 443727063.

It is an arithmetic number, because the mean of its divisors is an integer number (82976891217).

Almost surely, 2^331020111113 is an apocalyptic number.

It is an amenable number.

331020111113 is a deficient number, since it is larger than the sum of its proper divisors (887453755).

331020111113 is an equidigital number, since it uses as much as digits as its factorization.

331020111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887453754.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 331020111113 its reverse (311111020133), we get a palindrome (642131131246).

The spelling of 331020111113 in words is "three hundred thirty-one billion, twenty million, one hundred eleven thousand, one hundred thirteen".