12331221121357 has 2 divisors, whose sum is σ = 12331221121358. Its totient is φ = 12331221121356.

The previous prime is 12331221121343. The next prime is 12331221121361. The reversal of 12331221121357 is 75312112213321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12113142395236 + 218078726121 = 3480394^2 + 466989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331221121357 - 2²³ = 12331212732749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331221121337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165610560678 + 6165610560679.

It is an arithmetic number, because the mean of its divisors is an integer number (6165610560679).

Almost surely, 2^{12331221121357} is an apocalyptic number.

It is an amenable number.

12331221121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331221121357 is an equidigital number, since it uses as much as digits as its factorization.

12331221121357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

Adding to 12331221121357 its reverse (75312112213321), we get a palindrome (87643333334678).

The spelling of 12331221121357 in words is "twelve trillion, three hundred thirty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred fifty-seven".