3121220033 has 8 divisors (see below), whose sum is σ = 3231546600. Its totient is φ = 3011073408.

The previous prime is 3121220029. The next prime is 3121220057. The reversal of 3121220033 is 3300221213.

It can be written as a sum of positive squares in 4 ways, for example, as 20178064 + 3101041969 = 4492^2 + 55687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121220033 - 2² = 3121220029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121219993 and 3121220020.

It is not an unprimeable number, because it can be changed into a prime (3121220633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9188 + ... + 79541.

It is an arithmetic number, because the mean of its divisors is an integer number (403943325).

Almost surely, 2^3121220033 is an apocalyptic number.

It is an amenable number.

3121220033 is a deficient number, since it is larger than the sum of its proper divisors (110326567).

3121220033 is a wasteful number, since it uses less digits than its factorization.

3121220033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89971.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3121220033 is about 55867.8801548797. The cubic root of 3121220033 is about 1461.4191544419.

Adding to 3121220033 its reverse (3300221213), we get a palindrome (6421441246).

The spelling of 3121220033 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, thirty-three".