4501228021 has 2 divisors, whose sum is σ = 4501228022. Its totient is φ = 4501228020.

The previous prime is 4501228001. The next prime is 4501228027. The reversal of 4501228021 is 1208221054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3316147396 + 1185080625 = 57586^2 + 34425^2 .

It is a cyclic number.

It is not a de Polignac number, because 4501228021 - 2¹⁵ = 4501195253 is a prime.

It is a super-2 number, since 2×4501228021² = 40522107394071152882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4501228027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2250614010 + 2250614011.

It is an arithmetic number, because the mean of its divisors is an integer number (2250614011).

Almost surely, 2^4501228021 is an apocalyptic number.

It is an amenable number.

4501228021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4501228021 is an equidigital number, since it uses as much as digits as its factorization.

4501228021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 4501228021 is about 67091.1918287341. The cubic root of 4501228021 is about 1651.1137898996.

Adding to 4501228021 its reverse (1208221054), we get a palindrome (5709449075).

The spelling of 4501228021 in words is "four billion, five hundred one million, two hundred twenty-eight thousand, twenty-one".