1321104053 has 4 divisors (see below), whose sum is σ = 1325352288. Its totient is φ = 1316855820.

The previous prime is 1321104049. The next prime is 1321104073. The reversal of 1321104053 is 3504011231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3504011231 = 7 ⋅500573033.

It is a cyclic number.

It is not a de Polignac number, because 1321104053 - 2² = 1321104049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321104073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123651 + ... + 2124272.

It is an arithmetic number, because the mean of its divisors is an integer number (331338072).

Almost surely, 2^1321104053 is an apocalyptic number.

It is an amenable number.

1321104053 is a deficient number, since it is larger than the sum of its proper divisors (4248235).

1321104053 is an equidigital number, since it uses as much as digits as its factorization.

1321104053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248234.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1321104053 is about 36346.9951027592. The cubic root of 1321104053 is about 1097.2670594576.

Adding to 1321104053 its reverse (3504011231), we get a palindrome (4825115284).

The spelling of 1321104053 in words is "one billion, three hundred twenty-one million, one hundred four thousand, fifty-three".