5242220021 has 8 divisors (see below), whose sum is σ = 5286887424. Its totient is φ = 5197605840.

The previous prime is 5242219979. The next prime is 5242220041. The reversal of 5242220021 is 1200222425.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5242220021 - 2²⁶ = 5175111157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5242219975 and 5242220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5242220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198791 + ... + 223611.

It is an arithmetic number, because the mean of its divisors is an integer number (660860928).

Almost surely, 2^5242220021 is an apocalyptic number.

It is an amenable number.

5242220021 is a deficient number, since it is larger than the sum of its proper divisors (44667403).

5242220021 is a wasteful number, since it uses less digits than its factorization.

5242220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26611.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 5242220021 is about 72403.1768709081. The cubic root of 5242220021 is about 1737.1543769238.

Adding to 5242220021 its reverse (1200222425), we get a palindrome (6442442446).

The spelling of 5242220021 in words is "five billion, two hundred forty-two million, two hundred twenty thousand, twenty-one".