3121131222 has 24 divisors (see below), whose sum is σ = 7377219720. Its totient is φ = 945797280.

The previous prime is 3121131203. The next prime is 3121131241. The reversal of 3121131222 is 2221311213.

3121131222 is a `hidden beast` number, since 312 + 1 + 131 + 222 = 666.

3121131222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3121131203) and next prime (3121131241).

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 = 3121131195 and 3121131204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7881447 + ... + 7881842.

It is an arithmetic number, because the mean of its divisors is an integer number (307384155).

Almost surely, 2^3121131222 is an apocalyptic number.

3121131222 is an abundant number, since it is smaller than the sum of its proper divisors (4256088498).

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

3121131222 is a wasteful number, since it uses less digits than its factorization.

3121131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15763308 (or 15763305 counting only the distinct ones).

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

The square root of 3121131222 is about 55867.0853186382. The cubic root of 3121131222 is about 1461.4052932672.

Adding to 3121131222 its reverse (2221311213), we get a palindrome (5342442435).

Subtracting from 3121131222 its reverse (2221311213), we obtain a square (899820009 = 29997²).

The spelling of 3121131222 in words is "three billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-two".