5021201621 has 4 divisors (see below), whose sum is σ = 5034312192. Its totient is φ = 5008091052.

The previous prime is 5021201597. The next prime is 5021201629. The reversal of 5021201621 is 1261021205.

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 a de Polignac number, because none of the positive numbers 2^k-5021201621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5021201593 and 5021201602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5021201629) 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, 6554711 + ... + 6555476.

It is an arithmetic number, because the mean of its divisors is an integer number (1258578048).

Almost surely, 2^5021201621 is an apocalyptic number.

It is an amenable number.

5021201621 is a deficient number, since it is larger than the sum of its proper divisors (13110571).

5021201621 is a wasteful number, since it uses less digits than its factorization.

5021201621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13110570.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 5021201621 is about 70860.4376291877. The cubic root of 5021201621 is about 1712.3894892794.

Adding to 5021201621 its reverse (1261021205), we get a palindrome (6282222826).

The spelling of 5021201621 in words is "five billion, twenty-one million, two hundred one thousand, six hundred twenty-one".