312221122 has 8 divisors (see below), whose sum is σ = 468559872. Its totient is φ = 156034500.

The previous prime is 312221101. The next prime is 312221123. The reversal of 312221122 is 221122213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 312221096 and 312221105.

It is not an unprimeable number, because it can be changed into a prime (312221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32754 + ... + 41197.

It is an arithmetic number, because the mean of its divisors is an integer number (58569984).

Almost surely, 2^312221122 is an apocalyptic number.

312221122 is a deficient number, since it is larger than the sum of its proper divisors (156338750).

312221122 is a wasteful number, since it uses less digits than its factorization.

312221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76064.

The product of its digits is 96, while the sum is 16.

The square root of 312221122 is about 17669.7799080803. The cubic root of 312221122 is about 678.4024797088.

Adding to 312221122 its reverse (221122213), we get a palindrome (533343335).

The spelling of 312221122 in words is "three hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".