4006312068821 has 4 divisors (see below), whose sum is σ = 4241977484652. Its totient is φ = 3770646652992.

The previous prime is 4006312068817. The next prime is 4006312068949. The reversal of 4006312068821 is 1288602136004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2576541835921 + 1429770232900 = 1605161^2 + 1195730^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006312068821 - 2² = 4006312068817 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 (4006312008821) 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 3 ways as a sum of consecutive naturals, for example, 117832707890 + ... + 117832707923.

It is an arithmetic number, because the mean of its divisors is an integer number (1060494371163).

Almost surely, 2^{4006312068821} is an apocalyptic number.

It is an amenable number.

4006312068821 is a deficient number, since it is larger than the sum of its proper divisors (235665415831).

4006312068821 is a wasteful number, since it uses less digits than its factorization.

4006312068821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235665415830.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 4006312068821 in words is "four trillion, six billion, three hundred twelve million, sixty-eight thousand, eight hundred twenty-one".