10223188816861 has 2 divisors, whose sum is σ = 10223188816862. Its totient is φ = 10223188816860.

The previous prime is 10223188816849. The next prime is 10223188816949. The reversal of 10223188816861 is 16861888132201.

10223188816861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8228120140900 + 1995068675961 = 2868470^2 + 1412469^2 .

It is a cyclic number.

It is not a de Polignac number, because 10223188816861 - 2¹⁹ = 10223188292573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10223188816801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111594408430 + 5111594408431.

It is an arithmetic number, because the mean of its divisors is an integer number (5111594408431).

Almost surely, 2^{10223188816861} is an apocalyptic number.

It is an amenable number.

10223188816861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10223188816861 is an equidigital number, since it uses as much as digits as its factorization.

10223188816861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1769472, while the sum is 55.

The spelling of 10223188816861 in words is "ten trillion, two hundred twenty-three billion, one hundred eighty-eight million, eight hundred sixteen thousand, eight hundred sixty-one".