3121221202 has 16 divisors (see below), whose sum is σ = 5179391424. Its totient is φ = 1398754000.

The previous prime is 3121221163. The next prime is 3121221209. The reversal of 3121221202 is 2021221213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3121221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997549 + ... + 1000672.

It is an arithmetic number, because the mean of its divisors is an integer number (323711964).

Almost surely, 2^3121221202 is an apocalyptic number.

3121221202 is a deficient number, since it is larger than the sum of its proper divisors (2058170222).

3121221202 is a wasteful number, since it uses less digits than its factorization.

3121221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998305.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3121221202 is about 55867.8906170620. The cubic root of 3121221202 is about 1461.4193368917.

Adding to 3121221202 its reverse (2021221213), we get a palindrome (5142442415).

The spelling of 3121221202 in words is "three billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred two".