2111772851 has 2 divisors, whose sum is σ = 2111772852. Its totient is φ = 2111772850.

The previous prime is 2111772829. The next prime is 2111772869. The reversal of 2111772851 is 1582771112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111772851 - 2⁶ = 2111772787 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111772811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055886425 + 1055886426.

It is an arithmetic number, because the mean of its divisors is an integer number (1055886426).

Almost surely, 2^2111772851 is an apocalyptic number.

2111772851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111772851 is an equidigital number, since it uses as much as digits as its factorization.

2111772851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 35.

The square root of 2111772851 is about 45954.0297580093. The cubic root of 2111772851 is about 1282.9677336184.

The spelling of 2111772851 in words is "two billion, one hundred eleven million, seven hundred seventy-two thousand, eight hundred fifty-one".