1122219991 has 2 divisors, whose sum is σ = 1122219992. Its totient is φ = 1122219990.

The previous prime is 1122219983. The next prime is 1122220013. The reversal of 1122219991 is 1999122211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122219991 - 2³ = 1122219983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122219991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122219391) 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, 561109995 + 561109996.

It is an arithmetic number, because the mean of its divisors is an integer number (561109996).

Almost surely, 2^1122219991 is an apocalyptic number.

1122219991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122219991 is an equidigital number, since it uses as much as digits as its factorization.

1122219991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 37.

The square root of 1122219991 is about 33499.5521014834. The cubic root of 1122219991 is about 1039.1845157473.

It can be divided in two parts, 11222 and 19991, that added together give a palindrome (31213).

The spelling of 1122219991 in words is "one billion, one hundred twenty-two million, two hundred nineteen thousand, nine hundred ninety-one".