1321404236245 has 16 divisors (see below), whose sum is σ = 1602467859888. Its totient is φ = 1045940797440.

The previous prime is 1321404236213. The next prime is 1321404236267. The reversal of 1321404236245 is 5426324041231.

It can be written as a sum of positive squares in 8 ways, for example, as 555120721 + 1320849115524 = 23561^2 + 1149282^2 .

It is not a de Polignac number, because 1321404236245 - 2⁵ = 1321404236213 is a prime.

It is a super-2 number, since 2×1321404236245² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1424565 + ... + 2161525.

It is an arithmetic number, because the mean of its divisors is an integer number (100154241243).

Almost surely, 2^{1321404236245} is an apocalyptic number.

It is an amenable number.

1321404236245 is a deficient number, since it is larger than the sum of its proper divisors (281063623643).

1321404236245 is an equidigital number, since it uses as much as digits as its factorization.

1321404236245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740760.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 1321404236245 its reverse (5426324041231), we get a palindrome (6747728277476).

The spelling of 1321404236245 in words is "one trillion, three hundred twenty-one billion, four hundred four million, two hundred thirty-six thousand, two hundred forty-five".