4036249979221 has 2 divisors, whose sum is σ = 4036249979222. Its totient is φ = 4036249979220.

The previous prime is 4036249979197. The next prime is 4036249979287. The reversal of 4036249979221 is 1229799426304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4024256663025 + 11993316196 = 2006055^2 + 109514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4036249979221 - 2¹¹ = 4036249977173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4036249979291) 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 as a sum of consecutive naturals, namely, 2018124989610 + 2018124989611.

It is an arithmetic number, because the mean of its divisors is an integer number (2018124989611).

Almost surely, 2^{4036249979221} is an apocalyptic number.

It is an amenable number.

4036249979221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4036249979221 is an equidigital number, since it uses as much as digits as its factorization.

4036249979221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 58.

The spelling of 4036249979221 in words is "four trillion, thirty-six billion, two hundred forty-nine million, nine hundred seventy-nine thousand, two hundred twenty-one".