3121220333 has 16 divisors (see below), whose sum is σ = 3915280896. Its totient is φ = 2417189040.

The previous prime is 3121220329. The next prime is 3121220363. The reversal of 3121220333 is 3330221213.

It is not a de Polignac number, because 3121220333 - 2² = 3121220329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121220303) 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, 111791 + ... + 136892.

It is an arithmetic number, because the mean of its divisors is an integer number (244705056).

Almost surely, 2^3121220333 is an apocalyptic number.

It is an amenable number.

3121220333 is a deficient number, since it is larger than the sum of its proper divisors (794060563).

3121220333 is a wasteful number, since it uses less digits than its factorization.

3121220333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248864.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3121220333 is about 55867.8828397855. The cubic root of 3121220333 is about 1461.4192012639.

Adding to 3121220333 its reverse (3330221213), we get a palindrome (6451441546).

The spelling of 3121220333 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, three hundred thirty-three".