12522011111 has 4 divisors (see below), whose sum is σ = 12559168752. Its totient is φ = 12484853472.

The previous prime is 12522011081. The next prime is 12522011137. The reversal of 12522011111 is 11111022521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12522011111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12522011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522011911) 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, 18578315 + ... + 18578988.

It is an arithmetic number, because the mean of its divisors is an integer number (3139792188).

Almost surely, 2^12522011111 is an apocalyptic number.

12522011111 is a deficient number, since it is larger than the sum of its proper divisors (37157641).

12522011111 is an equidigital number, since it uses as much as digits as its factorization.

12522011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37157640.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 12522011111 its reverse (11111022521), we get a palindrome (23633033632).

The spelling of 12522011111 in words is "twelve billion, five hundred twenty-two million, eleven thousand, one hundred eleven".