1122123491 has 2 divisors, whose sum is σ = 1122123492. Its totient is φ = 1122123490.

The previous prime is 1122123479. The next prime is 1122123493. The reversal of 1122123491 is 1943212211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1122123491 - 2¹⁰ = 1122122467 is a prime.

It is a super-2 number, since 2×1122123491² = 2518322258108054162, which contains 22 as substring.

Together with 1122123493, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122123491.

It is not a weakly prime, because it can be changed into another prime (1122123493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561061745 + 561061746.

It is an arithmetic number, because the mean of its divisors is an integer number (561061746).

Almost surely, 2^1122123491 is an apocalyptic number.

1122123491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122123491 is an equidigital number, since it uses as much as digits as its factorization.

1122123491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 1122123491 is about 33498.1117527541. Note that the first 3 decimals coincide. The cubic root of 1122123491 is about 1039.1547283078.

The spelling of 1122123491 in words is "one billion, one hundred twenty-two million, one hundred twenty-three thousand, four hundred ninety-one".