2123440011 has 36 divisors (see below), whose sum is σ = 3853014256. Its totient is φ = 1103081760.

The previous prime is 2123440003. The next prime is 2123440013. The reversal of 2123440011 is 1100443212.

2123440011 is a `hidden beast` number, since 21 + 234 + 400 + 11 = 666.

It is not a de Polignac number, because 2123440011 - 2³ = 2123440003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123440013) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 131656 + ... + 146901.

Almost surely, 2^2123440011 is an apocalyptic number.

2123440011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2123440011 is a deficient number, since it is larger than the sum of its proper divisors (1729574245).

2123440011 is a wasteful number, since it uses less digits than its factorization.

2123440011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278592 (or 278578 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2123440011 is about 46080.7987235464. The cubic root of 2123440011 is about 1285.3261166665.

Adding to 2123440011 its reverse (1100443212), we get a palindrome (3223883223).

The spelling of 2123440011 in words is "two billion, one hundred twenty-three million, four hundred forty thousand, eleven".