331220112331231 has 2 divisors, whose sum is σ = 331220112331232. Its totient is φ = 331220112331230.

The previous prime is 331220112331217. The next prime is 331220112331237. The reversal of 331220112331231 is 132133211022133.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331220112331231 - 2¹³ = 331220112323039 is a prime.

It is a super-2 number, since 2×331220112331231² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331220112331231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331220112331237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610056165615 + 165610056165616.

It is an arithmetic number, because the mean of its divisors is an integer number (165610056165616).

Almost surely, 2^{331220112331231} is an apocalyptic number.

331220112331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

331220112331231 is an equidigital number, since it uses as much as digits as its factorization.

331220112331231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 331220112331231 its reverse (132133211022133), we get a palindrome (463353323353364).

The spelling of 331220112331231 in words is "three hundred thirty-one trillion, two hundred twenty billion, one hundred twelve million, three hundred thirty-one thousand, two hundred thirty-one".