321421030143421 has 16 divisors (see below), whose sum is σ = 358085364381360. Its totient is φ = 286462563287040.

The previous prime is 321421030143419. The next prime is 321421030143427. The reversal of 321421030143421 is 124341030124123.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14989178155396 + 306431851988025 = 3871586^2 + 17505195^2 .

It is a cyclic number.

It is not a de Polignac number, because 321421030143421 - 2¹ = 321421030143419 is a prime.

It is a super-2 number, since 2×321421030143421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321421030143427) 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, 33948861 + ... + 42371773.

It is an arithmetic number, because the mean of its divisors is an integer number (22380335273835).

Almost surely, 2^{321421030143421} is an apocalyptic number.

It is an amenable number.

321421030143421 is a deficient number, since it is larger than the sum of its proper divisors (36664334237939).

321421030143421 is a wasteful number, since it uses less digits than its factorization.

321421030143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524176.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 321421030143421 its reverse (124341030124123), we get a palindrome (445762060267544).

The spelling of 321421030143421 in words is "three hundred twenty-one trillion, four hundred twenty-one billion, thirty million, one hundred forty-three thousand, four hundred twenty-one".