221407321099973 has 2 divisors, whose sum is σ = 221407321099974. Its totient is φ = 221407321099972.

The previous prime is 221407321099949. The next prime is 221407321100011. The reversal of 221407321099973 is 379990123704122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215892418385284 + 5514902714689 = 14693278^2 + 2348383^2 .

It is a cyclic number.

It is not a de Polignac number, because 221407321099973 - 2²⁰ = 221407320051397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221407321092973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110703660549986 + 110703660549987.

It is an arithmetic number, because the mean of its divisors is an integer number (110703660549987).

Almost surely, 2^{221407321099973} is an apocalyptic number.

It is an amenable number.

221407321099973 is a deficient number, since it is larger than the sum of its proper divisors (1).

221407321099973 is an equidigital number, since it uses as much as digits as its factorization.

221407321099973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 59.

The spelling of 221407321099973 in words is "two hundred twenty-one trillion, four hundred seven billion, three hundred twenty-one million, ninety-nine thousand, nine hundred seventy-three".