1220111111383 has 2 divisors, whose sum is σ = 1220111111384. Its totient is φ = 1220111111382.

The previous prime is 1220111111369. The next prime is 1220111111423. The reversal of 1220111111383 is 3831111110221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220111111383 is a prime.

It is a super-2 number, since 2×1220111111383² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220111111363) 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, 610055555691 + 610055555692.

It is an arithmetic number, because the mean of its divisors is an integer number (610055555692).

Almost surely, 2^{1220111111383} is an apocalyptic number.

1220111111383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111111383 is an equidigital number, since it uses as much as digits as its factorization.

1220111111383 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 1220111111383 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, three hundred eighty-three".