321255214021 has 16 divisors (see below), whose sum is σ = 387075461760. Its totient is φ = 260461854720.

The previous prime is 321255214003. The next prime is 321255214037. The reversal of 321255214021 is 120412552123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321255214021 - 2¹⁹ = 321254689733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321255214081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1798876 + ... + 1969381.

It is an arithmetic number, because the mean of its divisors is an integer number (24192216360).

Almost surely, 2^321255214021 is an apocalyptic number.

It is an amenable number.

321255214021 is a deficient number, since it is larger than the sum of its proper divisors (65820247739).

321255214021 is a wasteful number, since it uses less digits than its factorization.

321255214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768924.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 321255214021 its reverse (120412552123), we get a palindrome (441667766144).

The spelling of 321255214021 in words is "three hundred twenty-one billion, two hundred fifty-five million, two hundred fourteen thousand, twenty-one".