1223720119 has 2 divisors, whose sum is σ = 1223720120. Its totient is φ = 1223720118.

The previous prime is 1223720117. The next prime is 1223720131. The reversal of 1223720119 is 9110273221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223720119 - 2¹ = 1223720117 is a prime.

It is a super-2 number, since 2×1223720119² = 2994981859290748322, which contains 22 as substring.

Together with 1223720117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223720117) 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, 611860059 + 611860060.

It is an arithmetic number, because the mean of its divisors is an integer number (611860060).

Almost surely, 2^1223720119 is an apocalyptic number.

1223720119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223720119 is an equidigital number, since it uses as much as digits as its factorization.

1223720119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1223720119 is about 34981.7112074295. The cubic root of 1223720119 is about 1069.6147094467.

The spelling of 1223720119 in words is "one billion, two hundred twenty-three million, seven hundred twenty thousand, one hundred nineteen".