221012011322209 has 4 divisors (see below), whose sum is σ = 221264020458004. Its totient is φ = 220760002186416.

The previous prime is 221012011322203. The next prime is 221012011322231. The reversal of 221012011322209 is 902223110210122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79660480273984 + 141351531048225 = 8925272^2 + 11889135^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012011322209 - 2²¹ = 221012009225057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012011322203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126004566582 + ... + 126004568335.

It is an arithmetic number, because the mean of its divisors is an integer number (55316005114501).

Almost surely, 2^{221012011322209} is an apocalyptic number.

It is an amenable number.

221012011322209 is a deficient number, since it is larger than the sum of its proper divisors (252009135795).

221012011322209 is an equidigital number, since it uses as much as digits as its factorization.

221012011322209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252009135794.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 221012011322209 in words is "two hundred twenty-one trillion, twelve billion, eleven million, three hundred twenty-two thousand, two hundred nine".