12802850021 has 6 divisors (see below), whose sum is σ = 13863441330. Its totient is φ = 11818015248.

The previous prime is 12802850017. The next prime is 12802850029. The reversal of 12802850021 is 12005820821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 681940996 + 12120909025 = 26114^2 + 110095^2 .

It is not a de Polignac number, because 12802850021 - 2² = 12802850017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12802850029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37878086 + ... + 37878423.

It is an arithmetic number, because the mean of its divisors is an integer number (2310573555).

Almost surely, 2^12802850021 is an apocalyptic number.

It is an amenable number.

12802850021 is a deficient number, since it is larger than the sum of its proper divisors (1060591309).

12802850021 is an equidigital number, since it uses as much as digits as its factorization.

12802850021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75756535 (or 75756522 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The spelling of 12802850021 in words is "twelve billion, eight hundred two million, eight hundred fifty thousand, twenty-one".