11502123105 has 64 divisors (see below), whose sum is σ = 20804382720. Its totient is φ = 5377881600.

The previous prime is 11502123103. The next prime is 11502123131. The reversal of 11502123105 is 50132120511.

It is not a de Polignac number, because 11502123105 - 2¹ = 11502123103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11502123103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 550245 + ... + 570765.

It is an arithmetic number, because the mean of its divisors is an integer number (325068480).

Almost surely, 2^11502123105 is an apocalyptic number.

11502123105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11502123105 is a deficient number, since it is larger than the sum of its proper divisors (9302259615).

11502123105 is a wasteful number, since it uses less digits than its factorization.

11502123105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20662.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 11502123105 its reverse (50132120511), we get a palindrome (61634243616).

The spelling of 11502123105 in words is "eleven billion, five hundred two million, one hundred twenty-three thousand, one hundred five".