321203403020401 has 24 divisors (see below), whose sum is σ = 361672564141224. Its totient is φ = 284878624800000.

The previous prime is 321203403020377. The next prime is 321203403020411. The reversal of 321203403020401 is 104020304302123.

It can be written as a sum of positive squares in 4 ways, for example, as 8806792205376 + 312396610815025 = 2967624^2 + 17674745^2 .

It is not a de Polignac number, because 321203403020401 - 2³¹ = 321201255536753 is a prime.

It is a super-2 number, since 2×321203403020401² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321203403020411) 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, 827007951 + ... + 827396251.

It is an arithmetic number, because the mean of its divisors is an integer number (15069690172551).

Almost surely, 2^{321203403020401} is an apocalyptic number.

It is an amenable number.

321203403020401 is a deficient number, since it is larger than the sum of its proper divisors (40469161120823).

321203403020401 is a wasteful number, since it uses less digits than its factorization.

321203403020401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555105 (or 555094 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 321203403020401 its reverse (104020304302123), we get a palindrome (425223707322524).

The spelling of 321203403020401 in words is "three hundred twenty-one trillion, two hundred three billion, four hundred three million, twenty thousand, four hundred one".