321420441403 has 4 divisors (see below), whose sum is σ = 338337306760. Its totient is φ = 304503576048.

The previous prime is 321420441367. The next prime is 321420441431. The reversal of 321420441403 is 304144024123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321420441403 - 2¹³ = 321420433211 is a prime.

It is a super-2 number, since 2×321420441403² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321420441493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8458432650 + ... + 8458432687.

It is an arithmetic number, because the mean of its divisors is an integer number (84584326690).

Almost surely, 2^321420441403 is an apocalyptic number.

321420441403 is a deficient number, since it is larger than the sum of its proper divisors (16916865357).

321420441403 is a wasteful number, since it uses less digits than its factorization.

321420441403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16916865356.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 321420441403 its reverse (304144024123), we get a palindrome (625564465526).

The spelling of 321420441403 in words is "three hundred twenty-one billion, four hundred twenty million, four hundred forty-one thousand, four hundred three".