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BaseRepresentation
bin1100001110110111101…
…01110011010111000101
31111011212102212102200201
412013123311303113011
523341233314021041
6521025550410501
742236300155354
oct6073365632705
91434772772621
10420300142021
11152280522581
1269559800a31
13308322635b6
14164b229799b
hex61dbd735c5

420300142021 has 2 divisors, whose sum is σ = 420300142022. Its totient is φ = 420300142020.

The previous prime is 420300142019. The next prime is 420300142049. The reversal of 420300142021 is 120241003024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277608856996 + 142691285025 = 526886^2 + 377745^2 .

It is a cyclic number.

It is not a de Polignac number, because 420300142021 - 21 = 420300142019 is a prime.

Together with 420300142019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 420300142021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420300142051) 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, 210150071010 + 210150071011.

It is an arithmetic number, because the mean of its divisors is an integer number (210150071011).

Almost surely, 2420300142021 is an apocalyptic number.

It is an amenable number.

420300142021 is a deficient number, since it is larger than the sum of its proper divisors (1).

420300142021 is an equidigital number, since it uses as much as digits as its factorization.

420300142021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 420300142021 its reverse (120241003024), we get a palindrome (540541145045).

The spelling of 420300142021 in words is "four hundred twenty billion, three hundred million, one hundred forty-two thousand, twenty-one".