221421203312411 has 2 divisors, whose sum is σ = 221421203312412. Its totient is φ = 221421203312410.

The previous prime is 221421203312389. The next prime is 221421203312467. The reversal of 221421203312411 is 114213302124122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221421203312411 is a prime.

It is not a weakly prime, because it can be changed into another prime (221421203212411) 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, 110710601656205 + 110710601656206.

It is an arithmetic number, because the mean of its divisors is an integer number (110710601656206).

Almost surely, 2^{221421203312411} is an apocalyptic number.

221421203312411 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421203312411 is an equidigital number, since it uses as much as digits as its factorization.

221421203312411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 221421203312411 its reverse (114213302124122), we get a palindrome (335634505436533).

The spelling of 221421203312411 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, three hundred twelve thousand, four hundred eleven".