420525100302421 has 2 divisors, whose sum is σ = 420525100302422. Its totient is φ = 420525100302420.

The previous prime is 420525100302383. The next prime is 420525100302443. The reversal of 420525100302421 is 124203001525024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384505429616100 + 36019670686321 = 19608810^2 + 6001639^2 .

It is a cyclic number.

It is not a de Polignac number, because 420525100302421 - 2¹¹ = 420525100300373 is a prime.

It is a super-2 number, since 2×420525100302421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420525100309421) 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, 210262550151210 + 210262550151211.

It is an arithmetic number, because the mean of its divisors is an integer number (210262550151211).

Almost surely, 2^{420525100302421} is an apocalyptic number.

It is an amenable number.

420525100302421 is a deficient number, since it is larger than the sum of its proper divisors (1).

420525100302421 is an equidigital number, since it uses as much as digits as its factorization.

420525100302421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 420525100302421 its reverse (124203001525024), we get a palindrome (544728101827445).

The spelling of 420525100302421 in words is "four hundred twenty trillion, five hundred twenty-five billion, one hundred million, three hundred two thousand, four hundred twenty-one".