1320121130357 has 2 divisors, whose sum is σ = 1320121130358. Its totient is φ = 1320121130356.

The previous prime is 1320121130303. The next prime is 1320121130359. The reversal of 1320121130357 is 7530311210231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128171119716 + 191950010641 = 1062154^2 + 438121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320121130357 - 2¹⁴ = 1320121113973 is a prime.

Together with 1320121130359, 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 (1320121130359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660060565178 + 660060565179.

It is an arithmetic number, because the mean of its divisors is an integer number (660060565179).

Almost surely, 2^{1320121130357} is an apocalyptic number.

It is an amenable number.

1320121130357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320121130357 is an equidigital number, since it uses as much as digits as its factorization.

1320121130357 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 29.

Adding to 1320121130357 its reverse (7530311210231), we get a palindrome (8850432340588).

The spelling of 1320121130357 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, one hundred thirty thousand, three hundred fifty-seven".