421511520211 has 2 divisors, whose sum is σ = 421511520212. Its totient is φ = 421511520210.

The previous prime is 421511520191. The next prime is 421511520229. The reversal of 421511520211 is 112025115124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421511520211 - 2⁵ = 421511520179 is a prime.

It is a super-2 number, since 2×421511520211² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421511527211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210755760105 + 210755760106.

It is an arithmetic number, because the mean of its divisors is an integer number (210755760106).

Almost surely, 2^421511520211 is an apocalyptic number.

421511520211 is a deficient number, since it is larger than the sum of its proper divisors (1).

421511520211 is an equidigital number, since it uses as much as digits as its factorization.

421511520211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 421511520211 its reverse (112025115124), we get a palindrome (533536635335).

The spelling of 421511520211 in words is "four hundred twenty-one billion, five hundred eleven million, five hundred twenty thousand, two hundred eleven".