1121380919 has 2 divisors, whose sum is σ = 1121380920. Its totient is φ = 1121380918.

The previous prime is 1121380913. The next prime is 1121380921. The reversal of 1121380919 is 9190831211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121380919 - 2¹⁶ = 1121315383 is a prime.

It is a super-2 number, since 2×1121380919² = 2514990330994569122, which contains 22 as substring.

Together with 1121380921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121380913) 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, 560690459 + 560690460.

It is an arithmetic number, because the mean of its divisors is an integer number (560690460).

Almost surely, 2^1121380919 is an apocalyptic number.

1121380919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121380919 is an equidigital number, since it uses as much as digits as its factorization.

1121380919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1121380919 is about 33487.0261295326. The cubic root of 1121380919 is about 1038.9254554194.

The spelling of 1121380919 in words is "one billion, one hundred twenty-one million, three hundred eighty thousand, nine hundred nineteen".