4120255021 has 4 divisors (see below), whose sum is σ = 4124046592. Its totient is φ = 4116463452.

The previous prime is 4120254979. The next prime is 4120255049. The reversal of 4120255021 is 1205520214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4120255021 - 2⁷ = 4120254893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4120254983 and 4120255001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4120255421) 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, 1894155 + ... + 1896328.

It is an arithmetic number, because the mean of its divisors is an integer number (1031011648).

Almost surely, 2^4120255021 is an apocalyptic number.

It is an amenable number.

4120255021 is a deficient number, since it is larger than the sum of its proper divisors (3791571).

4120255021 is a wasteful number, since it uses less digits than its factorization.

4120255021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791570.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 4120255021 is about 64189.2126529061. The cubic root of 4120255021 is about 1603.1519923719.

Adding to 4120255021 its reverse (1205520214), we get a palindrome (5325775235).

The spelling of 4120255021 in words is "four billion, one hundred twenty million, two hundred fifty-five thousand, twenty-one".