12126226720 has 24 divisors (see below), whose sum is σ = 28648211004. Its totient is φ = 4850490624.

The previous prime is 12126226639. The next prime is 12126226747. The reversal of 12126226720 is 2762262121.

It can be written as a sum of positive squares in 2 ways, for example, as 11793091216 + 333135504 = 108596^2 + 18252^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37894299 + ... + 37894618.

Almost surely, 2^12126226720 is an apocalyptic number.

12126226720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12126226720 is an abundant number, since it is smaller than the sum of its proper divisors (16521984284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12126226720 is an equidigital number, since it uses as much as digits as its factorization.

12126226720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75788932 (or 75788924 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 12126226720 its reverse (2762262121), we get a palindrome (14888488841).

The spelling of 12126226720 in words is "twelve billion, one hundred twenty-six million, two hundred twenty-six thousand, seven hundred twenty".