3121311222 has 48 divisors (see below), whose sum is σ = 7292441520. Its totient is φ = 961632000.

The previous prime is 3121311211. The next prime is 3121311233. The reversal of 3121311222 is 2221131213.

3121311222 is a `hidden beast` number, since 312 + 131 + 1 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (3121311211) and next prime (3121311233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 3121311195 and 3121311204.

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 in 23 ways as a sum of consecutive naturals, for example, 97279 + ... + 125322.

It is an arithmetic number, because the mean of its divisors is an integer number (151925865).

Almost surely, 2^3121311222 is an apocalyptic number.

3121311222 is an abundant number, since it is smaller than the sum of its proper divisors (4171130298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121311222 is a wasteful number, since it uses less digits than its factorization.

3121311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222669 (or 222666 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3121311222 is about 55868.6962618603. The cubic root of 3121311222 is about 1461.4333864892.

Adding to 3121311222 its reverse (2221131213), we get a palindrome (5342442435).

Subtracting from 3121311222 its reverse (2221131213), we obtain a square (900180009 = 30003²).

The spelling of 3121311222 in words is "three billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty-two".