5242720400021 has 16 divisors (see below), whose sum is σ = 5669371673280. Its totient is φ = 4819412928000.

The previous prime is 5242720400017. The next prime is 5242720400053. The reversal of 5242720400021 is 1200040272425.

It is a cyclic number.

It is not a de Polignac number, because 5242720400021 - 2² = 5242720400017 is a prime.

It is a super-2 number, since 2×5242720400021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5242720402021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21706106 + ... + 21946308.

It is an arithmetic number, because the mean of its divisors is an integer number (354335729580).

Almost surely, 2^{5242720400021} is an apocalyptic number.

It is an amenable number.

5242720400021 is a deficient number, since it is larger than the sum of its proper divisors (426651273259).

5242720400021 is a wasteful number, since it uses less digits than its factorization.

5242720400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247156.

The product of its (nonzero) digits is 8960, while the sum is 29.

Adding to 5242720400021 its reverse (1200040272425), we get a palindrome (6442760672446).

The spelling of 5242720400021 in words is "five trillion, two hundred forty-two billion, seven hundred twenty million, four hundred thousand, twenty-one".