1123417021 has 2 divisors, whose sum is σ = 1123417022. Its totient is φ = 1123417020.

The previous prime is 1123417013. The next prime is 1123417049. The reversal of 1123417021 is 1207143211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626751225 + 496665796 = 25035^2 + 22286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123417021 - 2³ = 1123417013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123416983 and 1123417001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123417121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561708510 + 561708511.

It is an arithmetic number, because the mean of its divisors is an integer number (561708511).

Almost surely, 2^1123417021 is an apocalyptic number.

It is an amenable number.

1123417021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123417021 is an equidigital number, since it uses as much as digits as its factorization.

1123417021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1123417021 is about 33517.4136979571. The cubic root of 1123417021 is about 1039.5538708430.

The spelling of 1123417021 in words is "one billion, one hundred twenty-three million, four hundred seventeen thousand, twenty-one".