3121222106 has 4 divisors (see below), whose sum is σ = 4681833162. Its totient is φ = 1560611052.

The previous prime is 3121222033. The next prime is 3121222109. The reversal of 3121222106 is 6012221213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2890030081 + 231192025 = 53759^2 + 15205^2 .

It is not an unprimeable number, because it can be changed into a prime (3121222109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780305525 + ... + 780305528.

Almost surely, 2^3121222106 is an apocalyptic number.

3121222106 is a deficient number, since it is larger than the sum of its proper divisors (1560611056).

3121222106 is a wasteful number, since it uses less digits than its factorization.

3121222106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560611055.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3121222106 is about 55867.8987075762. The cubic root of 3121222106 is about 1461.4194779821.

Adding to 3121222106 its reverse (6012221213), we get a palindrome (9133443319).

The spelling of 3121222106 in words is "three billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred six".