2111681153 has 2 divisors, whose sum is σ = 2111681154. Its totient is φ = 2111681152.

The previous prime is 2111681149. The next prime is 2111681161. The reversal of 2111681153 is 3511861112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1491272689 + 620408464 = 38617^2 + 24908^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111681153 - 2² = 2111681149 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111681123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055840576 + 1055840577.

It is an arithmetic number, because the mean of its divisors is an integer number (1055840577).

Almost surely, 2^2111681153 is an apocalyptic number.

It is an amenable number.

2111681153 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111681153 is an equidigital number, since it uses as much as digits as its factorization.

2111681153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 29.

The square root of 2111681153 is about 45953.0320327179. The cubic root of 2111681153 is about 1282.9491635533.

The spelling of 2111681153 in words is "two billion, one hundred eleven million, six hundred eighty-one thousand, one hundred fifty-three".