312221022004 has 6 divisors (see below), whose sum is σ = 546386788514. Its totient is φ = 156110511000.

The previous prime is 312221021971. The next prime is 312221022013. The reversal of 312221022004 is 400220122213.

It can be written as a sum of positive squares in only one way, i.e., 310139837604 + 2081184400 = 556902^2 + 45620^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 39027627747 + ... + 39027627754.

Almost surely, 2^312221022004 is an apocalyptic number.

It is an amenable number.

312221022004 is a deficient number, since it is larger than the sum of its proper divisors (234165766510).

312221022004 is a wasteful number, since it uses less digits than its factorization.

312221022004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78055255505 (or 78055255503 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 312221022004 its reverse (400220122213), we get a palindrome (712441144217).

The spelling of 312221022004 in words is "three hundred twelve billion, two hundred twenty-one million, twenty-two thousand, four".