4051120421 has 2 divisors, whose sum is σ = 4051120422. Its totient is φ = 4051120420.

The previous prime is 4051120369. The next prime is 4051120459. The reversal of 4051120421 is 1240211504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3765172321 + 285948100 = 61361^2 + 16910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4051120421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4051120393 and 4051120402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4051120921) 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 as a sum of consecutive naturals, namely, 2025560210 + 2025560211.

It is an arithmetic number, because the mean of its divisors is an integer number (2025560211).

Almost surely, 2^4051120421 is an apocalyptic number.

It is an amenable number.

4051120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4051120421 is an equidigital number, since it uses as much as digits as its factorization.

4051120421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4051120421 is about 63648.4125567952. The cubic root of 4051120421 is about 1594.1348309590.

Adding to 4051120421 its reverse (1240211504), we get a palindrome (5291331925).

The spelling of 4051120421 in words is "four billion, fifty-one million, one hundred twenty thousand, four hundred twenty-one".