123516011 has 4 divisors (see below), whose sum is σ = 123677400. Its totient is φ = 123354624.

The previous prime is 123515993. The next prime is 123516061. The reversal of 123516011 is 110615321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110615321 = 19 ⋅5821859.

It is a cyclic number.

It is not a de Polignac number, because 123516011 - 2¹⁰ = 123514987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123516061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79541 + ... + 81078.

It is an arithmetic number, because the mean of its divisors is an integer number (30919350).

Almost surely, 2^123516011 is an apocalyptic number.

123516011 is a deficient number, since it is larger than the sum of its proper divisors (161389).

123516011 is an equidigital number, since it uses as much as digits as its factorization.

123516011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161388.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 123516011 is about 11113.7757310466. The cubic root of 123516011 is about 498.0134658165.

The spelling of 123516011 in words is "one hundred twenty-three million, five hundred sixteen thousand, eleven".