1123562121 has 16 divisors (see below), whose sum is σ = 1705328640. Its totient is φ = 651339920.

The previous prime is 1123562021. The next prime is 1123562161. The reversal of 1123562121 is 1212653211.

It is a happy number.

It is not a de Polignac number, because 1123562121 - 2⁹ = 1123561609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123562091 and 1123562100.

It is not an unprimeable number, because it can be changed into a prime (1123562161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739401 + ... + 740918.

It is an arithmetic number, because the mean of its divisors is an integer number (106583040).

Almost surely, 2^1123562121 is an apocalyptic number.

1123562121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123562121 is a deficient number, since it is larger than the sum of its proper divisors (581766519).

1123562121 is a wasteful number, since it uses less digits than its factorization.

1123562121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480356.

The product of its digits is 720, while the sum is 24.

The square root of 1123562121 is about 33519.5781745535. The cubic root of 1123562121 is about 1039.5986250083.

The spelling of 1123562121 in words is "one billion, one hundred twenty-three million, five hundred sixty-two thousand, one hundred twenty-one".