331312112123111 has 4 divisors (see below), whose sum is σ = 378642413854992. Its totient is φ = 283981810391232.

The previous prime is 331312112123107. The next prime is 331312112123123. The reversal of 331312112123111 is 111321211213133.

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 331312112123111 - 2² = 331312112123107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331312112123141) 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, 23665150865930 + ... + 23665150865943.

It is an arithmetic number, because the mean of its divisors is an integer number (94660603463748).

Almost surely, 2^{331312112123111} is an apocalyptic number.

331312112123111 is a deficient number, since it is larger than the sum of its proper divisors (47330301731881).

331312112123111 is an equidigital number, since it uses as much as digits as its factorization.

331312112123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47330301731880.

The product of its digits is 648, while the sum is 26.

Adding to 331312112123111 its reverse (111321211213133), we get a palindrome (442633323336244).

The spelling of 331312112123111 in words is "three hundred thirty-one trillion, three hundred twelve billion, one hundred twelve million, one hundred twenty-three thousand, one hundred eleven".