12511101015 has 24 divisors (see below), whose sum is σ = 24783895968. Its totient is φ = 5719360320.

The previous prime is 12511101011. The next prime is 12511101047. The reversal of 12511101015 is 51010111521.

It is not a de Polignac number, because 12511101015 - 2² = 12511101011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511101011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19858576 + ... + 19859205.

It is an arithmetic number, because the mean of its divisors is an integer number (1032662332).

Almost surely, 2^12511101015 is an apocalyptic number.

12511101015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12511101015 is a deficient number, since it is larger than the sum of its proper divisors (12272794953).

12511101015 is a wasteful number, since it uses less digits than its factorization.

12511101015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39717799 (or 39717796 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 18.

Adding to 12511101015 its reverse (51010111521), we get a palindrome (63521212536).

It can be divided in two parts, 12511 and 101015, that added together give a triangular number (113526 = T₄₇₆).

The spelling of 12511101015 in words is "twelve billion, five hundred eleven million, one hundred one thousand, fifteen".