1321102013021 has 16 divisors (see below), whose sum is σ = 1523617569408. Its totient is φ = 1122058828800.

The previous prime is 1321102013003. The next prime is 1321102013069. The reversal of 1321102013021 is 1203102011231.

It is not a de Polignac number, because 1321102013021 - 2¹⁴ = 1321101996637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321102013321) by changing a digit.

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, 453200 + ... + 1687481.

It is an arithmetic number, because the mean of its divisors is an integer number (95226098088).

Almost surely, 2^{1321102013021} is an apocalyptic number.

It is an amenable number.

1321102013021 is a deficient number, since it is larger than the sum of its proper divisors (202515556387).

1321102013021 is a wasteful number, since it uses less digits than its factorization.

1321102013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141492.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1321102013021 its reverse (1203102011231), we get a palindrome (2524204024252).

The spelling of 1321102013021 in words is "one trillion, three hundred twenty-one billion, one hundred two million, thirteen thousand, twenty-one".