428110724021 has 2 divisors, whose sum is σ = 428110724022. Its totient is φ = 428110724020.

The previous prime is 428110724017. The next prime is 428110724159. The reversal of 428110724021 is 120427011824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310572144100 + 117538579921 = 557290^2 + 342839^2 .

It is a cyclic number.

It is not a de Polignac number, because 428110724021 - 2² = 428110724017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428110724621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214055362010 + 214055362011.

It is an arithmetic number, because the mean of its divisors is an integer number (214055362011).

Almost surely, 2^428110724021 is an apocalyptic number.

It is an amenable number.

428110724021 is a deficient number, since it is larger than the sum of its proper divisors (1).

428110724021 is an equidigital number, since it uses as much as digits as its factorization.

428110724021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

Adding to 428110724021 its reverse (120427011824), we get a palindrome (548537735845).

The spelling of 428110724021 in words is "four hundred twenty-eight billion, one hundred ten million, seven hundred twenty-four thousand, twenty-one".