312223211121 has 16 divisors (see below), whose sum is σ = 419647345920. Its totient is φ = 206475244560.

The previous prime is 312223211107. The next prime is 312223211123. The reversal of 312223211121 is 121112322213.

It is not a de Polignac number, because 312223211121 - 2⁵ = 312223211089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312223211123) 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, 804846 + ... + 1127928.

It is an arithmetic number, because the mean of its divisors is an integer number (26227959120).

Almost surely, 2^312223211121 is an apocalyptic number.

It is an amenable number.

312223211121 is a deficient number, since it is larger than the sum of its proper divisors (107424134799).

312223211121 is a wasteful number, since it uses less digits than its factorization.

312223211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325676.

The product of its digits is 288, while the sum is 21.

Adding to 312223211121 its reverse (121112322213), we get a palindrome (433335533334).

The spelling of 312223211121 in words is "three hundred twelve billion, two hundred twenty-three million, two hundred eleven thousand, one hundred twenty-one".