221930543801 has 2 divisors, whose sum is σ = 221930543802. Its totient is φ = 221930543800.

The previous prime is 221930543789. The next prime is 221930543837. The reversal of 221930543801 is 108345039122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217309807225 + 4620736576 = 466165^2 + 67976^2 .

It is a cyclic number.

It is not a de Polignac number, because 221930543801 - 2³⁴ = 204750674617 is a prime.

It is not a weakly prime, because it can be changed into another prime (221930543881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110965271900 + 110965271901.

It is an arithmetic number, because the mean of its divisors is an integer number (110965271901).

Almost surely, 2^221930543801 is an apocalyptic number.

It is an amenable number.

221930543801 is a deficient number, since it is larger than the sum of its proper divisors (1).

221930543801 is an equidigital number, since it uses as much as digits as its factorization.

221930543801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 221930543801 in words is "two hundred twenty-one billion, nine hundred thirty million, five hundred forty-three thousand, eight hundred one".