331121201309189 has 2 divisors, whose sum is σ = 331121201309190. Its totient is φ = 331121201309188.

The previous prime is 331121201309183. The next prime is 331121201309191. The reversal of 331121201309189 is 981903102121133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176698079885089 + 154423121424100 = 13292783^2 + 12426710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331121201309189 is a prime.

Together with 331121201309191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331121201309183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165560600654594 + 165560600654595.

It is an arithmetic number, because the mean of its divisors is an integer number (165560600654595).

Almost surely, 2^{331121201309189} is an apocalyptic number.

It is an amenable number.

331121201309189 is a deficient number, since it is larger than the sum of its proper divisors (1).

331121201309189 is an equidigital number, since it uses as much as digits as its factorization.

331121201309189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 331121201309189 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred one million, three hundred nine thousand, one hundred eighty-nine".