221585139089 has 2 divisors, whose sum is σ = 221585139090. Its totient is φ = 221585139088.

The previous prime is 221585139077. The next prime is 221585139119. The reversal of 221585139089 is 980931585122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136208974225 + 85376164864 = 369065^2 + 292192^2 .

It is a cyclic number.

It is not a de Polignac number, because 221585139089 - 2⁴ = 221585139073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221585139089.

It is not a weakly prime, because it can be changed into another prime (221585139029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110792569544 + 110792569545.

It is an arithmetic number, because the mean of its divisors is an integer number (110792569545).

Almost surely, 2^221585139089 is an apocalyptic number.

It is an amenable number.

221585139089 is a deficient number, since it is larger than the sum of its proper divisors (1).

221585139089 is an equidigital number, since it uses as much as digits as its factorization.

221585139089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 221585139089 in words is "two hundred twenty-one billion, five hundred eighty-five million, one hundred thirty-nine thousand, eighty-nine".