3120421121 has 2 divisors, whose sum is σ = 3120421122. Its totient is φ = 3120421120.

The previous prime is 3120421081. The next prime is 3120421231. The reversal of 3120421121 is 1211240213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3095809600 + 24611521 = 55640^2 + 4961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3120421121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3120421121.

It is not a weakly prime, because it can be changed into another prime (3120421021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560210560 + 1560210561.

It is an arithmetic number, because the mean of its divisors is an integer number (1560210561).

Almost surely, 2^3120421121 is an apocalyptic number.

It is an amenable number.

3120421121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120421121 is an equidigital number, since it uses as much as digits as its factorization.

3120421121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 3120421121 is about 55860.7296855313. The cubic root of 3120421121 is about 1461.2944548141.

Adding to 3120421121 its reverse (1211240213), we get a palindrome (4331661334).

It can be divided in two parts, 31204 and 21121, that added together give a palindrome (52325).

The spelling of 3120421121 in words is "three billion, one hundred twenty million, four hundred twenty-one thousand, one hundred twenty-one".