1220111939 has 2 divisors, whose sum is σ = 1220111940. Its totient is φ = 1220111938.

The previous prime is 1220111927. The next prime is 1220112007. The reversal of 1220111939 is 9391110221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220111939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220141939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055969 + 610055970.

It is an arithmetic number, because the mean of its divisors is an integer number (610055970).

Almost surely, 2^1220111939 is an apocalyptic number.

1220111939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111939 is an equidigital number, since it uses as much as digits as its factorization.

1220111939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1220111939 is about 34930.1007585149. The cubic root of 1220111939 is about 1068.5624095181.

The spelling of 1220111939 in words is "one billion, two hundred twenty million, one hundred eleven thousand, nine hundred thirty-nine".