1321033403421 has 6 divisors (see below), whose sum is σ = 1908159360510. Its totient is φ = 880688935608.

The previous prime is 1321033403407. The next prime is 1321033403491. The reversal of 1321033403421 is 1243043301231.

It is a happy number.

1321033403421 is a `hidden beast` number, since 1 + 3 + 210 + 3 + 3 + 403 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 691748177796 + 629285225625 = 831714^2 + 793275^2 .

It is not a de Polignac number, because 1321033403421 - 2¹⁰ = 1321033402397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321033403401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73390744626 + ... + 73390744643.

It is an arithmetic number, because the mean of its divisors is an integer number (318026560085).

Almost surely, 2^{1321033403421} is an apocalyptic number.

It is an amenable number.

1321033403421 is a deficient number, since it is larger than the sum of its proper divisors (587125957089).

1321033403421 is a wasteful number, since it uses less digits than its factorization.

1321033403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146781489275 (or 146781489272 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1321033403421 its reverse (1243043301231), we get a palindrome (2564076704652).

The spelling of 1321033403421 in words is "one trillion, three hundred twenty-one billion, thirty-three million, four hundred three thousand, four hundred twenty-one".