321122221012 has 12 divisors (see below), whose sum is σ = 562047946740. Its totient is φ = 160537093376.

The previous prime is 321122220971. The next prime is 321122221033. The reversal of 321122221012 is 210122221123.

It can be written as a sum of positive squares in 2 ways, for example, as 292417051536 + 28705169476 = 540756^2 + 169426^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5974183 + ... + 6027694.

It is an arithmetic number, because the mean of its divisors is an integer number (46837328895).

Almost surely, 2^321122221012 is an apocalyptic number.

It is an amenable number.

321122221012 is a deficient number, since it is larger than the sum of its proper divisors (240925725728).

321122221012 is a wasteful number, since it uses less digits than its factorization.

321122221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12008570 (or 12008568 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 321122221012 its reverse (210122221123), we get a palindrome (531244442135).

The spelling of 321122221012 in words is "three hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twelve".