4251203121 has 32 divisors (see below), whose sum is σ = 6347859840. Its totient is φ = 2508300800.

The previous prime is 4251203111. The next prime is 4251203123. The reversal of 4251203121 is 1213021524.

It is a cyclic number.

It is not a de Polignac number, because 4251203121 - 2⁶ = 4251203057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4251203123) 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 31 ways as a sum of consecutive naturals, for example, 685591 + ... + 691763.

It is an arithmetic number, because the mean of its divisors is an integer number (198370620).

Almost surely, 2^4251203121 is an apocalyptic number.

4251203121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4251203121 is a deficient number, since it is larger than the sum of its proper divisors (2096656719).

4251203121 is a wasteful number, since it uses less digits than its factorization.

4251203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 4251203121 is about 65201.2509159142. The cubic root of 4251203121 is about 1619.9587350410.

Adding to 4251203121 its reverse (1213021524), we get a palindrome (5464224645).

The spelling of 4251203121 in words is "four billion, two hundred fifty-one million, two hundred three thousand, one hundred twenty-one".