221421423024211 has 12 divisors (see below), whose sum is σ = 231950237359680. Its totient is φ = 211352244881360.

The previous prime is 221421423024187. The next prime is 221421423024223. The reversal of 221421423024211 is 112420324124122.

It is not a de Polignac number, because 221421423024211 - 2³¹ = 221419275540563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221421423024281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436663120 + ... + 437169901.

It is an arithmetic number, because the mean of its divisors is an integer number (19329186446640).

Almost surely, 2^{221421423024211} is an apocalyptic number.

221421423024211 is a deficient number, since it is larger than the sum of its proper divisors (10528814335469).

221421423024211 is an equidigital number, since it uses as much as digits as its factorization.

221421423024211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873833546 (or 873833523 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 221421423024211 its reverse (112420324124122), we get a palindrome (333841747148333).

The spelling of 221421423024211 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, four hundred twenty-three million, twenty-four thousand, two hundred eleven".