12108211631 has 48 divisors (see below), whose sum is σ = 13983969600. Its totient is φ = 10427526144.

The previous prime is 12108211627. The next prime is 12108211651. The reversal of 12108211631 is 13611280121.

It is not a de Polignac number, because 12108211631 - 2² = 12108211627 is a prime.

It is a super-2 number, since 2×12108211631² (a number of 21 digits) contains 22 as substring.

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 12108211631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12108211651) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 33727430 + ... + 33727788.

It is an arithmetic number, because the mean of its divisors is an integer number (291332700).

Almost surely, 2^12108211631 is an apocalyptic number.

12108211631 is a deficient number, since it is larger than the sum of its proper divisors (1875757969).

12108211631 is a wasteful number, since it uses less digits than its factorization.

12108211631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 12108211631 its reverse (13611280121), we get a palindrome (25719491752).

The spelling of 12108211631 in words is "twelve billion, one hundred eight million, two hundred eleven thousand, six hundred thirty-one".