216105144123 has 16 divisors (see below), whose sum is σ = 314368572672. Its totient is φ = 130958724000.

The previous prime is 216105144043. The next prime is 216105144149. The reversal of 216105144123 is 321441501612.

It is not a de Polignac number, because 216105144123 - 2⁸ = 216105143867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216105144223) 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, 36663 + ... + 658448.

It is an arithmetic number, because the mean of its divisors is an integer number (19648035792).

Almost surely, 2^216105144123 is an apocalyptic number.

216105144123 is a deficient number, since it is larger than the sum of its proper divisors (98263428549).

216105144123 is a wasteful number, since it uses less digits than its factorization.

216105144123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704546.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 216105144123 its reverse (321441501612), we get a palindrome (537546645735).

The spelling of 216105144123 in words is "two hundred sixteen billion, one hundred five million, one hundred forty-four thousand, one hundred twenty-three".