4782120121 has 2 divisors, whose sum is σ = 4782120122. Its totient is φ = 4782120120.

The previous prime is 4782120073. The next prime is 4782120131. The reversal of 4782120121 is 1210212874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4618561600 + 163558521 = 67960^2 + 12789^2 .

It is a cyclic number.

It is not a de Polignac number, because 4782120121 - 2²¹ = 4780022969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4782120121.

It is not a weakly prime, because it can be changed into another prime (4782120131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2391060060 + 2391060061.

It is an arithmetic number, because the mean of its divisors is an integer number (2391060061).

Almost surely, 2^4782120121 is an apocalyptic number.

It is an amenable number.

4782120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4782120121 is an equidigital number, since it uses as much as digits as its factorization.

4782120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 4782120121 is about 69152.8750016946. The cubic root of 4782120121 is about 1684.7682142644.

Adding to 4782120121 its reverse (1210212874), we get a palindrome (5992332995).

The spelling of 4782120121 in words is "four billion, seven hundred eighty-two million, one hundred twenty thousand, one hundred twenty-one".