12126813436828 has 12 divisors (see below), whose sum is σ = 21262656576672. Its totient is φ = 6051768700640.

The previous prime is 12126813436823. The next prime is 12126813436867. The reversal of 12126813436828 is 82863431862121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126813436823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909502100 + ... + 2909506267.

It is an arithmetic number, because the mean of its divisors is an integer number (1771888048056).

Almost surely, 2^{12126813436828} is an apocalyptic number.

It is an amenable number.

12126813436828 is a deficient number, since it is larger than the sum of its proper divisors (9135843139844).

12126813436828 is a wasteful number, since it uses less digits than its factorization.

12126813436828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819008892 (or 5819008890 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The spelling of 12126813436828 in words is "twelve trillion, one hundred twenty-six billion, eight hundred thirteen million, four hundred thirty-six thousand, eight hundred twenty-eight".