12213321651 has 24 divisors (see below), whose sum is σ = 17891025984. Its totient is φ = 8027757360.

The previous prime is 12213321647. The next prime is 12213321683. The reversal of 12213321651 is 15612331221.

12213321651 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 3 + 3 + 2 + 1 + 651 = 666.

It is not a de Polignac number, because 12213321651 - 2² = 12213321647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12213322651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173140 + ... + 233246.

It is an arithmetic number, because the mean of its divisors is an integer number (745459416).

Almost surely, 2^12213321651 is an apocalyptic number.

12213321651 is a deficient number, since it is larger than the sum of its proper divisors (5677704333).

12213321651 is a wasteful number, since it uses less digits than its factorization.

12213321651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60431 (or 60428 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 12213321651 its reverse (15612331221), we get a palindrome (27825652872).

The spelling of 12213321651 in words is "twelve billion, two hundred thirteen million, three hundred twenty-one thousand, six hundred fifty-one".