4211936666081 has 4 divisors (see below), whose sum is σ = 4211948514564. Its totient is φ = 4211924817600.

The previous prime is 4211936666051. The next prime is 4211936666123. The reversal of 4211936666081 is 1806666391124.

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 3966729472225 + 245207193856 = 1991665^2 + 495184^2 .

It is a cyclic number.

It is not a de Polignac number, because 4211936666081 - 2²² = 4211932471777 is a prime.

It is a super-2 number, since 2×4211936666081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4211936666051) 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, 5373980 + ... + 6107661.

It is an arithmetic number, because the mean of its divisors is an integer number (1052987128641).

Almost surely, 2^{4211936666081} is an apocalyptic number.

It is an amenable number.

4211936666081 is a deficient number, since it is larger than the sum of its proper divisors (11848483).

4211936666081 is a wasteful number, since it uses less digits than its factorization.

4211936666081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848482.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 4211936666081 in words is "four trillion, two hundred eleven billion, nine hundred thirty-six million, six hundred sixty-six thousand, eighty-one".