4751256121 has 2 divisors, whose sum is σ = 4751256122. Its totient is φ = 4751256120.

The previous prime is 4751256091. The next prime is 4751256127. The reversal of 4751256121 is 1216521574.

4751256121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3187844521 + 1563411600 = 56461^2 + 39540^2 .

It is a cyclic number.

It is not a de Polignac number, because 4751256121 - 2¹³ = 4751247929 is a prime.

It is not a weakly prime, because it can be changed into another prime (4751256127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2375628060 + 2375628061.

It is an arithmetic number, because the mean of its divisors is an integer number (2375628061).

Almost surely, 2^4751256121 is an apocalyptic number.

It is an amenable number.

4751256121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4751256121 is an equidigital number, since it uses as much as digits as its factorization.

4751256121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 4751256121 is about 68929.3560175924. The cubic root of 4751256121 is about 1681.1358674594.

Adding to 4751256121 its reverse (1216521574), we get a palindrome (5967777695).

The spelling of 4751256121 in words is "four billion, seven hundred fifty-one million, two hundred fifty-six thousand, one hundred twenty-one".