221211020111149 has 2 divisors, whose sum is σ = 221211020111150. Its totient is φ = 221211020111148.

The previous prime is 221211020111117. The next prime is 221211020111203. The reversal of 221211020111149 is 941111020112122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197088747768900 + 24122272342249 = 14038830^2 + 4911443^2 .

It is a cyclic number.

It is not a de Polignac number, because 221211020111149 - 2⁵ = 221211020111117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211020115149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605510055574 + 110605510055575.

It is an arithmetic number, because the mean of its divisors is an integer number (110605510055575).

Almost surely, 2^{221211020111149} is an apocalyptic number.

It is an amenable number.

221211020111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211020111149 is an equidigital number, since it uses as much as digits as its factorization.

221211020111149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 221211020111149 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, one hundred forty-nine".