1220111021149 has 2 divisors, whose sum is σ = 1220111021150. Its totient is φ = 1220111021148.

The previous prime is 1220111021083. The next prime is 1220111021191. The reversal of 1220111021149 is 9411201110221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218650405625 + 1460615524 = 1103925^2 + 38218^2 .

It is an emirp because it is prime and its reverse (9411201110221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220111021149 - 2³⁹ = 670355207261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220111024149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055510574 + 610055510575.

It is an arithmetic number, because the mean of its divisors is an integer number (610055510575).

Almost surely, 2^{1220111021149} is an apocalyptic number.

It is an amenable number.

1220111021149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111021149 is an equidigital number, since it uses as much as digits as its factorization.

1220111021149 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 1220111021149 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty-one thousand, one hundred forty-nine".