3121222105 has 16 divisors (see below), whose sum is σ = 3770426880. Its totient is φ = 2480368768.

The previous prime is 3121222033. The next prime is 3121222109. The reversal of 3121222105 is 5012221213.

It is a cyclic number.

It is not a de Polignac number, because 3121222105 - 2¹¹ = 3121220057 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 1630629 + ... + 1632541.

It is an arithmetic number, because the mean of its divisors is an integer number (235651680).

Almost surely, 2^3121222105 is an apocalyptic number.

It is an amenable number.

3121222105 is a deficient number, since it is larger than the sum of its proper divisors (649204775).

3121222105 is a wasteful number, since it uses less digits than its factorization.

3121222105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3121222105 is about 55867.8986986266. The cubic root of 3121222105 is about 1461.4194778261.

Adding to 3121222105 its reverse (5012221213), we get a palindrome (8133443318).

The spelling of 3121222105 in words is "three billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred five".