321021203434 has 16 divisors (see below), whose sum is σ = 511224135048. Its totient is φ = 150663785472.

The previous prime is 321021203413. The next prime is 321021203443. The reversal of 321021203434 is 434302120123.

It can be written as a sum of positive squares in 4 ways, for example, as 318327282025 + 2693921409 = 564205^2 + 51903^2 .

It is a super-2 number, since 2×321021203434² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321021203399 and 321021203408.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12643887 + ... + 12669250.

Almost surely, 2^321021203434 is an apocalyptic number.

321021203434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

321021203434 is a deficient number, since it is larger than the sum of its proper divisors (190202931614).

321021203434 is a wasteful number, since it uses less digits than its factorization.

321021203434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25313529.

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

Adding to 321021203434 its reverse (434302120123), we get a palindrome (755323323557).

The spelling of 321021203434 in words is "three hundred twenty-one billion, twenty-one million, two hundred three thousand, four hundred thirty-four".