2111201747857 has 2 divisors, whose sum is σ = 2111201747858. Its totient is φ = 2111201747856.

The previous prime is 2111201747849. The next prime is 2111201747869. The reversal of 2111201747857 is 7587471021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1813221140481 + 297980607376 = 1346559^2 + 545876^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111201747857 - 2³ = 2111201747849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111201747807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055600873928 + 1055600873929.

It is an arithmetic number, because the mean of its divisors is an integer number (1055600873929).

Almost surely, 2^{2111201747857} is an apocalyptic number.

It is an amenable number.

2111201747857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111201747857 is an equidigital number, since it uses as much as digits as its factorization.

2111201747857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 46.

Adding to 2111201747857 its reverse (7587471021112), we get a palindrome (9698672768969).

The spelling of 2111201747857 in words is "two trillion, one hundred eleven billion, two hundred one million, seven hundred forty-seven thousand, eight hundred fifty-seven".