221034115009 has 2 divisors, whose sum is σ = 221034115010. Its totient is φ = 221034115008.

The previous prime is 221034115007. The next prime is 221034115067. The reversal of 221034115009 is 900511430122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212244490000 + 8789625009 = 460700^2 + 93753^2 .

It is a cyclic number.

It is not a de Polignac number, because 221034115009 - 2¹ = 221034115007 is a prime.

Together with 221034115007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221034115007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110517057504 + 110517057505.

It is an arithmetic number, because the mean of its divisors is an integer number (110517057505).

Almost surely, 2^221034115009 is an apocalyptic number.

It is an amenable number.

221034115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

221034115009 is an equidigital number, since it uses as much as digits as its factorization.

221034115009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 221034115009 in words is "two hundred twenty-one billion, thirty-four million, one hundred fifteen thousand, nine".