12105222651 has 6 divisors (see below), whose sum is σ = 17485321620. Its totient is φ = 8070148428.

The previous prime is 12105222559. The next prime is 12105222671. The reversal of 12105222651 is 15622250121.

12105222651 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 5 + 2 + 2 + 2 + 651 = 666.

It is not a de Polignac number, because 12105222651 - 2¹⁰ = 12105221627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12105222671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672512361 + ... + 672512378.

It is an arithmetic number, because the mean of its divisors is an integer number (2914220270).

Almost surely, 2^12105222651 is an apocalyptic number.

12105222651 is a deficient number, since it is larger than the sum of its proper divisors (5380098969).

12105222651 is a wasteful number, since it uses less digits than its factorization.

12105222651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345024745 (or 1345024742 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12105222651 its reverse (15622250121), we get a palindrome (27727472772).

The spelling of 12105222651 in words is "twelve billion, one hundred five million, two hundred twenty-two thousand, six hundred fifty-one".