2111540123 has 8 divisors (see below), whose sum is σ = 2632569600. Its totient is φ = 1645355880.

The previous prime is 2111540117. The next prime is 2111540149. The reversal of 2111540123 is 3210451112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111540123 - 2²² = 2107345819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111540095 and 2111540104.

It is not an unprimeable number, because it can be changed into a prime (2111540113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13711223 + ... + 13711376.

It is an arithmetic number, because the mean of its divisors is an integer number (329071200).

Almost surely, 2^2111540123 is an apocalyptic number.

2111540123 is a deficient number, since it is larger than the sum of its proper divisors (521029477).

2111540123 is a wasteful number, since it uses less digits than its factorization.

2111540123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27422617.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2111540123 is about 45951.4975055221. The cubic root of 2111540123 is about 1282.9206020526.

Adding to 2111540123 its reverse (3210451112), we get a palindrome (5321991235).

The spelling of 2111540123 in words is "two billion, one hundred eleven million, five hundred forty thousand, one hundred twenty-three".