21112241686 has 16 divisors (see below), whose sum is σ = 32808402000. Its totient is φ = 10177175008.

The previous prime is 21112241681. The next prime is 21112241687. The reversal of 21112241686 is 68614221112.

It is a super-2 number, since 2×21112241686² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112241681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226861 + ... + 306088.

It is an arithmetic number, because the mean of its divisors is an integer number (2050525125).

Almost surely, 2^21112241686 is an apocalyptic number.

21112241686 is a deficient number, since it is larger than the sum of its proper divisors (11696160314).

21112241686 is a wasteful number, since it uses less digits than its factorization.

21112241686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533663.

The product of its digits is 9216, while the sum is 34.

Adding to 21112241686 its reverse (68614221112), we get a palindrome (89726462798).

The spelling of 21112241686 in words is "twenty-one billion, one hundred twelve million, two hundred forty-one thousand, six hundred eighty-six".