321400235021021 has 16 divisors (see below), whose sum is σ = 346735231452288. Its totient is φ = 296152717972800.

The previous prime is 321400235021011. The next prime is 321400235021069. The reversal of 321400235021021 is 120120532004123.

It is not a de Polignac number, because 321400235021021 - 2³⁰ = 321399161279197 is a prime.

It is a super-2 number, since 2×321400235021021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321400235021011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118241591 + ... + 120929211.

It is an arithmetic number, because the mean of its divisors is an integer number (21670951965768).

Almost surely, 2^{321400235021021} is an apocalyptic number.

It is an amenable number.

321400235021021 is a deficient number, since it is larger than the sum of its proper divisors (25334996431267).

321400235021021 is a wasteful number, since it uses less digits than its factorization.

321400235021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703892.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 321400235021021 its reverse (120120532004123), we get a palindrome (441520767025144).

The spelling of 321400235021021 in words is "three hundred twenty-one trillion, four hundred billion, two hundred thirty-five million, twenty-one thousand, twenty-one".