1321023022357 has 2 divisors, whose sum is σ = 1321023022358. Its totient is φ = 1321023022356.

The previous prime is 1321023022343. The next prime is 1321023022471. The reversal of 1321023022357 is 7532203201231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1283340059716 + 37682962641 = 1132846^2 + 194121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321023022357 - 2¹¹ = 1321023020309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321023052357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660511511178 + 660511511179.

It is an arithmetic number, because the mean of its divisors is an integer number (660511511179).

Almost surely, 2^{1321023022357} is an apocalyptic number.

It is an amenable number.

1321023022357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321023022357 is an equidigital number, since it uses as much as digits as its factorization.

1321023022357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

Adding to 1321023022357 its reverse (7532203201231), we get a palindrome (8853226223588).

The spelling of 1321023022357 in words is "one trillion, three hundred twenty-one billion, twenty-three million, twenty-two thousand, three hundred fifty-seven".