4278711068921 has 2 divisors, whose sum is σ = 4278711068922. Its totient is φ = 4278711068920.

The previous prime is 4278711068911. The next prime is 4278711068939. The reversal of 4278711068921 is 1298601178724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2283664992400 + 1995046076521 = 1511180^2 + 1412461^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278711068921 - 2⁶ = 4278711068857 is a prime.

It is a super-2 number, since 2×4278711068921² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4278711068911) 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, 2139355534460 + 2139355534461.

It is an arithmetic number, because the mean of its divisors is an integer number (2139355534461).

Almost surely, 2^{4278711068921} is an apocalyptic number.

It is an amenable number.

4278711068921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278711068921 is an equidigital number, since it uses as much as digits as its factorization.

4278711068921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The spelling of 4278711068921 in words is "four trillion, two hundred seventy-eight billion, seven hundred eleven million, sixty-eight thousand, nine hundred twenty-one".