312002111212221 has 32 divisors (see below), whose sum is σ = 427224856025088. Its totient is φ = 202426173270720.

The previous prime is 312002111212189. The next prime is 312002111212279. The reversal of 312002111212221 is 122212111200213.

It is not a de Polignac number, because 312002111212221 - 2⁵ = 312002111212189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312002111212321) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 83515776 + ... + 87171606.

It is an arithmetic number, because the mean of its divisors is an integer number (13350776750784).

Almost surely, 2^{312002111212221} is an apocalyptic number.

It is an amenable number.

312002111212221 is a deficient number, since it is larger than the sum of its proper divisors (115222744812867).

312002111212221 is a wasteful number, since it uses less digits than its factorization.

312002111212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658281.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 312002111212221 its reverse (122212111200213), we get a palindrome (434214222412434).

The spelling of 312002111212221 in words is "three hundred twelve trillion, two billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".