12726222100 has 36 divisors (see below), whose sum is σ = 29240370684. Its totient is φ = 4791047680.

The previous prime is 12726222031. The next prime is 12726222133. The reversal of 12726222100 is 122262721.

It can be written as a sum of positive squares in 6 ways, for example, as 1090716676 + 11635505424 = 33026^2 + 107868^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3741307 + ... + 3744706.

It is an arithmetic number, because the mean of its divisors is an integer number (812232519).

Almost surely, 2^12726222100 is an apocalyptic number.

12726222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12726222100 is an abundant number, since it is smaller than the sum of its proper divisors (16514148584).

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

12726222100 is a wasteful number, since it uses less digits than its factorization.

12726222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486044 (or 7486037 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 12726222100 its reverse (122262721), we get a palindrome (12848484821).

The spelling of 12726222100 in words is "twelve billion, seven hundred twenty-six million, two hundred twenty-two thousand, one hundred".