3101220121 has 4 divisors (see below), whose sum is σ = 3283644852. Its totient is φ = 2918795392.

The previous prime is 3101220119. The next prime is 3101220137. The reversal of 3101220121 is 1210221013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 825930121 + 2275290000 = 28739^2 + 47700^2 .

It is a cyclic number.

It is not a de Polignac number, because 3101220121 - 2¹ = 3101220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3101227121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91212340 + ... + 91212373.

It is an arithmetic number, because the mean of its divisors is an integer number (820911213).

Almost surely, 2^3101220121 is an apocalyptic number.

It is an amenable number.

3101220121 is a deficient number, since it is larger than the sum of its proper divisors (182424731).

3101220121 is a wasteful number, since it uses less digits than its factorization.

3101220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182424730.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 3101220121 is about 55688.5995604127. The cubic root of 3101220121 is about 1458.2910073056.

Adding to 3101220121 its reverse (1210221013), we get a palindrome (4311441134).

The spelling of 3101220121 in words is "three billion, one hundred one million, two hundred twenty thousand, one hundred twenty-one".