312101222 has 4 divisors (see below), whose sum is σ = 468151836. Its totient is φ = 156050610.

The previous prime is 312101221. The next prime is 312101233. The reversal of 312101222 is 222101213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222101213 = 1913 ⋅116101.

It is a junction number, because it is equal to n+sod(n) for n = 312101197 and 312101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312101221) 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 as a sum of consecutive naturals, namely, 78025304 + ... + 78025307.

It is an arithmetic number, because the mean of its divisors is an integer number (117037959).

Almost surely, 2^312101222 is an apocalyptic number.

312101222 is a deficient number, since it is larger than the sum of its proper divisors (156050614).

312101222 is a wasteful number, since it uses less digits than its factorization.

312101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156050613.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 312101222 is about 17666.3867839465. The cubic root of 312101222 is about 678.3156279382.

Adding to 312101222 its reverse (222101213), we get a palindrome (534202435).

Subtracting from 312101222 its reverse (222101213), we obtain a palindrome (90000009).

The spelling of 312101222 in words is "three hundred twelve million, one hundred one thousand, two hundred twenty-two".