221260117489 has 2 divisors, whose sum is σ = 221260117490. Its totient is φ = 221260117488.

The previous prime is 221260117487. The next prime is 221260117511. The reversal of 221260117489 is 984711062122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220961104225 + 299013264 = 470065^2 + 17292^2 .

It is a cyclic number.

It is not a de Polignac number, because 221260117489 - 2¹ = 221260117487 is a prime.

Together with 221260117487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221260117487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110630058744 + 110630058745.

It is an arithmetic number, because the mean of its divisors is an integer number (110630058745).

Almost surely, 2^221260117489 is an apocalyptic number.

It is an amenable number.

221260117489 is a deficient number, since it is larger than the sum of its proper divisors (1).

221260117489 is an equidigital number, since it uses as much as digits as its factorization.

221260117489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 221260117489 in words is "two hundred twenty-one billion, two hundred sixty million, one hundred seventeen thousand, four hundred eighty-nine".