1321123253 has 2 divisors, whose sum is σ = 1321123254. Its totient is φ = 1321123252.

The previous prime is 1321123247. The next prime is 1321123259. The reversal of 1321123253 is 3523211231.

It is a balanced prime because it is at equal distance from previous prime (1321123247) and next prime (1321123259).

It can be written as a sum of positive squares in only one way, i.e., 1081554769 + 239568484 = 32887^2 + 15478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321123253 - 2²⁴ = 1304346037 is a prime.

It is a super-3 number, since 3×1321123253³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321123259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660561626 + 660561627.

It is an arithmetic number, because the mean of its divisors is an integer number (660561627).

Almost surely, 2^1321123253 is an apocalyptic number.

It is an amenable number.

1321123253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321123253 is an equidigital number, since it uses as much as digits as its factorization.

1321123253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 1321123253 is about 36347.2592226704. The cubic root of 1321123253 is about 1097.2723750685.

Adding to 1321123253 its reverse (3523211231), we get a palindrome (4844334484).

The spelling of 1321123253 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred fifty-three".