420570422021 has 2 divisors, whose sum is σ = 420570422022. Its totient is φ = 420570422020.

The previous prime is 420570421949. The next prime is 420570422057. The reversal of 420570422021 is 120224075024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345554689921 + 75015732100 = 587839^2 + 273890^2 .

It is a cyclic number.

It is not a de Polignac number, because 420570422021 - 2¹⁰ = 420570420997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420570422221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210285211010 + 210285211011.

It is an arithmetic number, because the mean of its divisors is an integer number (210285211011).

Almost surely, 2^420570422021 is an apocalyptic number.

It is an amenable number.

420570422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

420570422021 is an equidigital number, since it uses as much as digits as its factorization.

420570422021 is an evil number, because the sum of its binary digits is even.

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

Adding to 420570422021 its reverse (120224075024), we get a palindrome (540794497045).

The spelling of 420570422021 in words is "four hundred twenty billion, five hundred seventy million, four hundred twenty-two thousand, twenty-one".