211420200421 has 16 divisors (see below), whose sum is σ = 225788276736. Its totient is φ = 197485340976.

The previous prime is 211420200419. The next prime is 211420200457. The reversal of 211420200421 is 124002024112.

211420200421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211420200421 - 2¹ = 211420200419 is a prime.

It is a super-2 number, since 2×211420200421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420200401) 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 in 15 ways as a sum of consecutive naturals, for example, 5661216 + ... + 5698438.

It is an arithmetic number, because the mean of its divisors is an integer number (14111767296).

Almost surely, 2^211420200421 is an apocalyptic number.

It is an amenable number.

211420200421 is a deficient number, since it is larger than the sum of its proper divisors (14368076315).

211420200421 is a wasteful number, since it uses less digits than its factorization.

211420200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43032.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211420200421 its reverse (124002024112), we get a palindrome (335422224533).

The spelling of 211420200421 in words is "two hundred eleven billion, four hundred twenty million, two hundred thousand, four hundred twenty-one".