11512217026 has 8 divisors (see below), whose sum is σ = 17594143164. Its totient is φ = 5647502640.

The previous prime is 11512216993. The next prime is 11512217033. The reversal of 11512217026 is 62071221511.

It is a Cunningham number, because it is equal to 107295²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 11512217025 + 1 = 107295^2 + 1^2 .

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

It is a super-2 number, since 2×11512217026² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11512216985 and 11512217003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54302805 + ... + 54303016.

Almost surely, 2^11512217026 is an apocalyptic number.

11512217026 is a deficient number, since it is larger than the sum of its proper divisors (6081926138).

11512217026 is a wasteful number, since it uses less digits than its factorization.

11512217026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108605876.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 11512217026 its reverse (62071221511), we get a palindrome (73583438537).

The spelling of 11512217026 in words is "eleven billion, five hundred twelve million, two hundred seventeen thousand, twenty-six".