12126220664 has 8 divisors (see below), whose sum is σ = 22736663760. Its totient is φ = 6063110328.

The previous prime is 12126220663. The next prime is 12126220669. The reversal of 12126220664 is 46602262121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12126220664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126220663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757888784 + ... + 757888799.

It is an arithmetic number, because the mean of its divisors is an integer number (2842082970).

Almost surely, 2^12126220664 is an apocalyptic number.

It is an amenable number.

12126220664 is a deficient number, since it is larger than the sum of its proper divisors (10610443096).

12126220664 is a wasteful number, since it uses less digits than its factorization.

12126220664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515777589 (or 1515777585 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 12126220664 its reverse (46602262121), we get a palindrome (58728482785).

The spelling of 12126220664 in words is "twelve billion, one hundred twenty-six million, two hundred twenty thousand, six hundred sixty-four".