321420233013021 has 24 divisors (see below), whose sum is σ = 467346587807736. Its totient is φ = 212866558594560.

The previous prime is 321420233013017. The next prime is 321420233013023. The reversal of 321420233013021 is 120310332024123.

321420233013021 is a `hidden beast` number, since 3 + 2 + 1 + 4 + 20 + 2 + 330 + 1 + 302 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9812618900100 + 311607614112921 = 3132510^2 + 17652411^2 .

It is not a de Polignac number, because 321420233013021 - 2² = 321420233013017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420233013023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193884840 + ... + 195535601.

It is an arithmetic number, because the mean of its divisors is an integer number (19472774491989).

Almost surely, 2^{321420233013021} is an apocalyptic number.

It is an amenable number.

321420233013021 is a deficient number, since it is larger than the sum of its proper divisors (145926354794715).

321420233013021 is a wasteful number, since it uses less digits than its factorization.

321420233013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389421053 (or 389421050 counting only the distinct ones).

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

Adding to 321420233013021 its reverse (120310332024123), we get a palindrome (441730565037144).

The spelling of 321420233013021 in words is "three hundred twenty-one trillion, four hundred twenty billion, two hundred thirty-three million, thirteen thousand, twenty-one".