221111012149 has 2 divisors, whose sum is σ = 221111012150. Its totient is φ = 221111012148.

The previous prime is 221111012147. The next prime is 221111012251. The reversal of 221111012149 is 941210111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196874127025 + 24236885124 = 443705^2 + 155682^2 .

It is a cyclic number.

It is not a de Polignac number, because 221111012149 - 2¹ = 221111012147 is a prime.

Together with 221111012147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111012147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555506074 + 110555506075.

It is an arithmetic number, because the mean of its divisors is an integer number (110555506075).

Almost surely, 2^221111012149 is an apocalyptic number.

It is an amenable number.

221111012149 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111012149 is an equidigital number, since it uses as much as digits as its factorization.

221111012149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 221111012149 in words is "two hundred twenty-one billion, one hundred eleven million, twelve thousand, one hundred forty-nine".