1321121033357 has 2 divisors, whose sum is σ = 1321121033358. Its totient is φ = 1321121033356.

The previous prime is 1321121033291. The next prime is 1321121033417. The reversal of 1321121033357 is 7533301211231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864278871556 + 456842161801 = 929666^2 + 675901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321121033357 - 2³⁴ = 1303941164173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321121003357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660560516678 + 660560516679.

It is an arithmetic number, because the mean of its divisors is an integer number (660560516679).

Almost surely, 2^{1321121033357} is an apocalyptic number.

It is an amenable number.

1321121033357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321121033357 is an equidigital number, since it uses as much as digits as its factorization.

1321121033357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

Adding to 1321121033357 its reverse (7533301211231), we get a palindrome (8854422244588).

The spelling of 1321121033357 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-one million, thirty-three thousand, three hundred fifty-seven".