331020121357 has 2 divisors, whose sum is σ = 331020121358. Its totient is φ = 331020121356.

The previous prime is 331020121319. The next prime is 331020121363. The reversal of 331020121357 is 753121020133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239126868036 + 91893253321 = 489006^2 + 303139^2 .

It is an emirp because it is prime and its reverse (753121020133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331020121357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331020121657) 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 as a sum of consecutive naturals, namely, 165510060678 + 165510060679.

It is an arithmetic number, because the mean of its divisors is an integer number (165510060679).

Almost surely, 2^331020121357 is an apocalyptic number.

It is an amenable number.

331020121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

331020121357 is an equidigital number, since it uses as much as digits as its factorization.

331020121357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The spelling of 331020121357 in words is "three hundred thirty-one billion, twenty million, one hundred twenty-one thousand, three hundred fifty-seven".