1123928121 has 16 divisors (see below), whose sum is σ = 1539457920. Its totient is φ = 728945280.

The previous prime is 1123928119. The next prime is 1123928131. The reversal of 1123928121 is 1218293211.

It is not a de Polignac number, because 1123928121 - 2¹ = 1123928119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123928131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31431 + ... + 56883.

It is an arithmetic number, because the mean of its divisors is an integer number (96216120).

Almost surely, 2^1123928121 is an apocalyptic number.

It is an amenable number.

1123928121 is a deficient number, since it is larger than the sum of its proper divisors (415529799).

1123928121 is a wasteful number, since it uses less digits than its factorization.

1123928121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25856.

The product of its digits is 1728, while the sum is 30.

The square root of 1123928121 is about 33525.0372259301. The cubic root of 1123928121 is about 1039.7114957260.

The spelling of 1123928121 in words is "one billion, one hundred twenty-three million, nine hundred twenty-eight thousand, one hundred twenty-one".