221402324201 has 2 divisors, whose sum is σ = 221402324202. Its totient is φ = 221402324200.

The previous prime is 221402324177. The next prime is 221402324243. The reversal of 221402324201 is 102423204122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173285708176 + 48116616025 = 416276^2 + 219355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221402324201 is a prime.

It is not a weakly prime, because it can be changed into another prime (221402324401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110701162100 + 110701162101.

It is an arithmetic number, because the mean of its divisors is an integer number (110701162101).

Almost surely, 2^221402324201 is an apocalyptic number.

It is an amenable number.

221402324201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221402324201 is an equidigital number, since it uses as much as digits as its factorization.

221402324201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221402324201 its reverse (102423204122), we get a palindrome (323825528323).

The spelling of 221402324201 in words is "two hundred twenty-one billion, four hundred two million, three hundred twenty-four thousand, two hundred one".