1321235021215 has 16 divisors (see below), whose sum is σ = 1593055766016. Its totient is φ = 1051946663200.

The previous prime is 1321235021203. The next prime is 1321235021237. The reversal of 1321235021215 is 5121205321231.

It is a de Polignac number, because none of the positive numbers 2^k-1321235021215 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 (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868500 + ... + 1843030.

It is an arithmetic number, because the mean of its divisors is an integer number (99565985376).

Almost surely, 2^{1321235021215} is an apocalyptic number.

1321235021215 is a deficient number, since it is larger than the sum of its proper divisors (271820744801).

1321235021215 is a wasteful number, since it uses less digits than its factorization.

1321235021215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975830.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 1321235021215 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-five million, twenty-one thousand, two hundred fifteen".