1321421103215 has 16 divisors (see below), whose sum is σ = 1586752901568. Its totient is φ = 1056438733056.

The previous prime is 1321421103203. The next prime is 1321421103253. The reversal of 1321421103215 is 5123011241231.

It is a cyclic number.

It is not a de Polignac number, because 1321421103215 - 2⁴ = 1321421103199 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 59800709 + ... + 59822801.

It is an arithmetic number, because the mean of its divisors is an integer number (99172056348).

Almost surely, 2^{1321421103215} is an apocalyptic number.

1321421103215 is a deficient number, since it is larger than the sum of its proper divisors (265331798353).

1321421103215 is a wasteful number, since it uses less digits than its factorization.

1321421103215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29458.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1321421103215 its reverse (5123011241231), we get a palindrome (6444432344446).

The spelling of 1321421103215 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, one hundred three thousand, two hundred fifteen".