1321043034253 has 2 divisors, whose sum is σ = 1321043034254. Its totient is φ = 1321043034252.

The previous prime is 1321043034191. The next prime is 1321043034293. The reversal of 1321043034253 is 3524303401231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067673758089 + 253369276164 = 1033283^2 + 503358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321043034253 - 2²⁵ = 1321009479821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321043034293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660521517126 + 660521517127.

It is an arithmetic number, because the mean of its divisors is an integer number (660521517127).

Almost surely, 2^{1321043034253} is an apocalyptic number.

It is an amenable number.

1321043034253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321043034253 is an equidigital number, since it uses as much as digits as its factorization.

1321043034253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 1321043034253 its reverse (3524303401231), we get a palindrome (4845346435484).

The spelling of 1321043034253 in words is "one trillion, three hundred twenty-one billion, forty-three million, thirty-four thousand, two hundred fifty-three".