111211220149 has 2 divisors, whose sum is σ = 111211220150. Its totient is φ = 111211220148.

The previous prime is 111211220117. The next prime is 111211220171. The reversal of 111211220149 is 941022112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58153322500 + 53057897649 = 241150^2 + 230343^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211220149 - 2⁵ = 111211220117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211220249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605610074 + 55605610075.

It is an arithmetic number, because the mean of its divisors is an integer number (55605610075).

Almost surely, 2^111211220149 is an apocalyptic number.

It is an amenable number.

111211220149 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211220149 is an equidigital number, since it uses as much as digits as its factorization.

111211220149 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 111211220149 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred forty-nine".