331212113 has 4 divisors (see below), whose sum is σ = 333062640. Its totient is φ = 329361588.

The previous prime is 331212107. The next prime is 331212137. The reversal of 331212113 is 311212133.

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 331212113 - 2⁴ = 331212097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331212091 and 331212100.

It is not an unprimeable number, because it can be changed into a prime (331215113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924995 + ... + 925352.

It is an arithmetic number, because the mean of its divisors is an integer number (83265660).

Almost surely, 2^331212113 is an apocalyptic number.

It is an amenable number.

331212113 is a deficient number, since it is larger than the sum of its proper divisors (1850527).

331212113 is a wasteful number, since it uses less digits than its factorization.

331212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850526.

The product of its digits is 108, while the sum is 17.

The square root of 331212113 is about 18199.2338575007. The cubic root of 331212113 is about 691.8873714088.

Adding to 331212113 its reverse (311212133), we get a palindrome (642424246).

The spelling of 331212113 in words is "three hundred thirty-one million, two hundred twelve thousand, one hundred thirteen".