1210421303545 has 8 divisors (see below), whose sum is σ = 1491762471624. Its totient is φ = 942165771264.

The previous prime is 1210421303519. The next prime is 1210421303617. The reversal of 1210421303545 is 5453031240121.

It can be written as a sum of positive squares in 4 ways, for example, as 223853889424 + 986567414121 = 473132^2 + 993261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210421303545 - 2⁵ = 1210421303513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3271408744 + ... + 3271409113.

It is an arithmetic number, because the mean of its divisors is an integer number (186470308953).

Almost surely, 2^{1210421303545} is an apocalyptic number.

It is an amenable number.

1210421303545 is a deficient number, since it is larger than the sum of its proper divisors (281341168079).

1210421303545 is an equidigital number, since it uses as much as digits as its factorization.

1210421303545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542817899.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1210421303545 its reverse (5453031240121), we get a palindrome (6663452543666).

The spelling of 1210421303545 in words is "one trillion, two hundred ten billion, four hundred twenty-one million, three hundred three thousand, five hundred forty-five".