403421313421 has 12 divisors (see below), whose sum is σ = 470468120988. Its totient is φ = 344918673792.

The previous prime is 403421313371. The next prime is 403421313457. The reversal of 403421313421 is 124313124304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 102009333321 + 301411980100 = 319389^2 + 549010^2 .

It is not a de Polignac number, because 403421313421 - 2¹³ = 403421305229 is a prime.

It is a super-2 number, since 2×403421313421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 403421313421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403421313521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10349676 + ... + 10388581.

It is an arithmetic number, because the mean of its divisors is an integer number (39205676749).

Almost surely, 2^403421313421 is an apocalyptic number.

It is an amenable number.

403421313421 is a deficient number, since it is larger than the sum of its proper divisors (67046807567).

403421313421 is a wasteful number, since it uses less digits than its factorization.

403421313421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20738668 (or 20738661 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 403421313421 its reverse (124313124304), we get a palindrome (527734437725).

The spelling of 403421313421 in words is "four hundred three billion, four hundred twenty-one million, three hundred thirteen thousand, four hundred twenty-one".