1321222032415 has 32 divisors (see below), whose sum is σ = 1608160506624. Its totient is φ = 1041942528000.

The previous prime is 1321222032401. The next prime is 1321222032457. The reversal of 1321222032415 is 5142302221231.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1321222032415 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 31 ways as a sum of consecutive naturals, for example, 144596727 + ... + 144605863.

It is an arithmetic number, because the mean of its divisors is an integer number (50255015832).

Almost surely, 2^{1321222032415} is an apocalyptic number.

1321222032415 is a deficient number, since it is larger than the sum of its proper divisors (286938474209).

1321222032415 is an equidigital number, since it uses as much as digits as its factorization.

1321222032415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1321222032415 its reverse (5142302221231), we get a palindrome (6463524253646).

The spelling of 1321222032415 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-two million, thirty-two thousand, four hundred fifteen".